anyone can help figure out whether the gross or net method is used for ads placed on network members and the reasons to choose this method based on the information given?

Revenue Recognition Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services The following table presents our revenues disaggregated by revenue source (in Millions). Sales and usage-based taxes are excluded from revenues. 2018 Year Ended December 31 2018.1 * 2017 Google properties $ 63,785 S 77,788 $ Google Network Members' properties 15,598 17,587 Google advertising revenues 79,383 95,375 Google other revenues 10,601 15,003 Other Bets revenues 288 477 Total rewenues $ 90,272 S 110,855 $ As noted above, prior period amounts have not been adjusted under the modified retrospective method. 121 Revenues Include hedging gains (losses) of 5339 milion $109) milion, and S(138) million for the years ended December 31, 2016, 2017 and 2018, respectively, which do not represent revenues recognized from contracts with customers. The following table presenta our revenues disaggregated by geography, based on the addresses of our customers (in millions): 96,336 19,982 116,318 19,906 595 136,819 Year Ended December 31. 2016 2017 2018 United States S 42.781 47% $ 52.449 4795 S 63,269 46% EMEA 30,304 34 36,046 33 44,567 33 APACT 12,559 14 16,235 15 21,374 15 Other Americas 4.628 5 6.125 7,609 Total revenues S 90,272 100% $ 110,855 100% S 136,819 100% 111 Regions represent Europe, the Middle East and Africa (EMEA); Asia-Pacific (APAC); and Canada and Latin America (Other Americas). 171 Revenues include hedging gains (losses) for the years ended December 31, 2016, 2017, and 2019 Advertising Revenues We generale revenues primarily by delivering advertising on Google properties and Google Network Members' properties. Google properties revenues consist primarily of advertising revenues generated on Google.com, the Google Search app, and other Google owned and operated properties like Gmail, Google Maps, Google Play, and YouTube. Google Network Members' properties revenues consist primarily of advertising revenues generated on Google Network Members' properties. Our customers generally purchase advertising inventory through Google Ads (formerly AdWords), Google Ad Manager as part of the Authorized Buyers marketplace (formerly DoubleClick AdExchange), and Google Marketing Platform (includes what was formerly DoubleClick Bid Manager), among others, We offer advertising on a cost-per-click basis, which means that an advertiser pays us only when a user clicks on an ad on Google properties or Google Network Members' properties or when a user views certain YouTube engagement ads. For these customers, we recognize revenue each time a user clicks on the ad or when a user views the ad for a specified period of time. We also offer advertising on other bases such as cost-per-impression, which means an advertiser pays us based on the number of times their ads are displayed on Google properties or Google Network Members' properties. For these customers, we recognize revenue each time an ad is displayed. For ads placed on Google Network Members' properties, we evaluate whether we are the principal (i..., report revenues on a gross basis) or agent (i.e., report revenues on a net basis). Generally, we report advertising revenues for ads placed on Google Network Members properties on a gross basis, that is, the amounts billed to our customers Revenue Recognition Revenues are recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services The following table presents our revenues disaggregated by revenue source (in Millions). Sales and usage-based taxes are excluded from revenues. 2018 Year Ended December 31 2018.1 * 2017 Google properties $ 63,785 S 77,788 $ Google Network Members' properties 15,598 17,587 Google advertising revenues 79,383 95,375 Google other revenues 10,601 15,003 Other Bets revenues 288 477 Total rewenues $ 90,272 S 110,855 $ As noted above, prior period amounts have not been adjusted under the modified retrospective method. 121 Revenues Include hedging gains (losses) of 5339 milion $109) milion, and S(138) million for the years ended December 31, 2016, 2017 and 2018, respectively, which do not represent revenues recognized from contracts with customers. The following table presenta our revenues disaggregated by geography, based on the addresses of our customers (in millions): 96,336 19,982 116,318 19,906 595 136,819 Year Ended December 31. 2016 2017 2018 United States S 42.781 47% $ 52.449 4795 S 63,269 46% EMEA 30,304 34 36,046 33 44,567 33 APACT 12,559 14 16,235 15 21,374 15 Other Americas 4.628 5 6.125 7,609 Total revenues S 90,272 100% $ 110,855 100% S 136,819 100% 111 Regions represent Europe, the Middle East and Africa (EMEA); Asia-Pacific (APAC); and Canada and Latin America (Other Americas). 171 Revenues include hedging gains (losses) for the years ended December 31, 2016, 2017, and 2019 Advertising Revenues We generale revenues primarily by delivering advertising on Google properties and Google Network Members' properties. Google properties revenues consist primarily of advertising revenues generated on Google.com, the Google Search app, and other Google owned and operated properties like Gmail, Google Maps, Google Play, and YouTube. Google Network Members' properties revenues consist primarily of advertising revenues generated on Google Network Members' properties. Our customers generally purchase advertising inventory through Google Ads (formerly AdWords), Google Ad Manager as part of the Authorized Buyers marketplace (formerly DoubleClick AdExchange), and Google Marketing Platform (includes what was formerly DoubleClick Bid Manager), among others, We offer advertising on a cost-per-click basis, which means that an advertiser pays us only when a user clicks on an ad on Google properties or Google Network Members' properties or when a user views certain YouTube engagement ads. For these customers, we recognize revenue each time a user clicks on the ad or when a user views the ad for a specified period of time. We also offer advertising on other bases such as cost-per-impression, which means an advertiser pays us based on the number of times their ads are displayed on Google properties or Google Network Members' properties. For these customers, we recognize revenue each time an ad is displayed. For ads placed on Google Network Members' properties, we evaluate whether we are the principal (i..., report revenues on a gross basis) or agent (i.e., report revenues on a net basis). Generally, we report advertising revenues for ads placed on Google Network Members properties on a gross basis, that is, the amounts billed to our customers