Focusing on the Year Ended December 31, 2020 and 2019 columns on page 16, list 3 of the larger non-GAAP adjustment line items in the non-GAAP reconciliation of reported (i.e., GAAP) net income to non-GAAP net income over the two years. For each item you highlight, comment on why Groupon might adjust net income for the item and whether and why you think each adjustment might provide valuable information for investors.

Three Months Ended December 31, 2019 $ 2020 13,978 $ 7 13,971 77,041 $ (2,602) 79,643 Year Ended December 31, 2020 2019 (287,931) $ (22,377) (1,751) (10,682) (286,180) (11,695) 382 2,597 (286,562) (14,292) (7,504) 761 435 13,971 (334) 79,208 170 13,637 8,073 2,352 79,378 19,098 2,936 (294,066) 39,010 9,730 6 206 (13,531) 81,615 14,355 39 31 72,497 412 (51,397) 6 64,836 1,405 3,799 3,526 (51,397) Net income (loss) attributable to common stockholders Less: Net income (loss) attributable to noncontrolling interest Net income (loss) Less: Income (loss) from discontinued operations, net of tax Income (loss) from continuing operations Less: Provision (benefit) for income taxes Income (loss) from continuing operations before provision (benefit) for income taxes Stock-based compensation Amortization expense of acquired intangibles Acquisition-related expense (benefit), net Restructuring charges (Gain) loss from changes in fair value of investments (Gain) loss from sale of investment (Gain) loss on equity method investment Impairment of investment Impairment of goodwill Impairment of long-lived assets Strategic advisor costs Intercompany foreign currency losses (gains) and reclassifications of translation adjustments to earnings Non-cash interest expense on convertible senior notes Non-GAAP income (loss) from continuing operations before provision (benefit) for income taxes Less: Non-GAAP provision for income taxes - Non-GAAP net income (loss) Net (income) loss attributable to noncontrolling interest Non-GAAP net income (loss) attributable to common stockholders Plus: Cash interest expense from assumed conversion of convertible senior notes Non-GAAP Net Income (loss) attributable to common stockholders plus assumed conversions 6,684 109,486 22.351 3,626 (13,178) 3,797 (4,744) 3,428 (23,883) 14,621 6,454 13,200 18,480 3,355 15,125 7 15,132 52,437 6,716 45,721 (2,602) 43,119 (46,194) 5,129 (51,323) (1,751) (53,074) 123,675 38,573 85,102 (10,682) 74,420 1,459 5,253 $ 15,132 $ 44,578 $ (53,074) $ 79,673 29,670,038 30,880,178 28,604,115 Weighted-average shares of common stock - diluted (2) Incremental dilutive securities Weighted average shares of common stock - non-GAAP 28,370,417 2,582,003 30,952,420 29,670,038 30,880,178 28,604,115 $ Diluted net income (loss) per share (2) Impact of non-GAAP adjustments and related tax effects Non-GAAP net income per share 0.47 $ 0.04 0.51 $ 2.62 $ (1.18) 1.44 $ (10.07) $ 8.21 (0.79) 3.36 $ (1.86) $ 2.57 (1) Adjustment to interest expense for assumed conversion of convertible senior notes excludes non-cash interest expense that has been Three Months Ended December 31, 2019 $ 2020 13,978 $ 7 13,971 77,041 $ (2,602) 79,643 Year Ended December 31, 2020 2019 (287,931) $ (22,377) (1,751) (10,682) (286,180) (11,695) 382 2,597 (286,562) (14,292) (7,504) 761 435 13,971 (334) 79,208 170 13,637 8,073 2,352 79,378 19,098 2,936 (294,066) 39,010 9,730 6 206 (13,531) 81,615 14,355 39 31 72,497 412 (51,397) 6 64,836 1,405 3,799 3,526 (51,397) Net income (loss) attributable to common stockholders Less: Net income (loss) attributable to noncontrolling interest Net income (loss) Less: Income (loss) from discontinued operations, net of tax Income (loss) from continuing operations Less: Provision (benefit) for income taxes Income (loss) from continuing operations before provision (benefit) for income taxes Stock-based compensation Amortization expense of acquired intangibles Acquisition-related expense (benefit), net Restructuring charges (Gain) loss from changes in fair value of investments (Gain) loss from sale of investment (Gain) loss on equity method investment Impairment of investment Impairment of goodwill Impairment of long-lived assets Strategic advisor costs Intercompany foreign currency losses (gains) and reclassifications of translation adjustments to earnings Non-cash interest expense on convertible senior notes Non-GAAP income (loss) from continuing operations before provision (benefit) for income taxes Less: Non-GAAP provision for income taxes - Non-GAAP net income (loss) Net (income) loss attributable to noncontrolling interest Non-GAAP net income (loss) attributable to common stockholders Plus: Cash interest expense from assumed conversion of convertible senior notes Non-GAAP Net Income (loss) attributable to common stockholders plus assumed conversions 6,684 109,486 22.351 3,626 (13,178) 3,797 (4,744) 3,428 (23,883) 14,621 6,454 13,200 18,480 3,355 15,125 7 15,132 52,437 6,716 45,721 (2,602) 43,119 (46,194) 5,129 (51,323) (1,751) (53,074) 123,675 38,573 85,102 (10,682) 74,420 1,459 5,253 $ 15,132 $ 44,578 $ (53,074) $ 79,673 29,670,038 30,880,178 28,604,115 Weighted-average shares of common stock - diluted (2) Incremental dilutive securities Weighted average shares of common stock - non-GAAP 28,370,417 2,582,003 30,952,420 29,670,038 30,880,178 28,604,115 $ Diluted net income (loss) per share (2) Impact of non-GAAP adjustments and related tax effects Non-GAAP net income per share 0.47 $ 0.04 0.51 $ 2.62 $ (1.18) 1.44 $ (10.07) $ 8.21 (0.79) 3.36 $ (1.86) $ 2.57 (1) Adjustment to interest expense for assumed conversion of convertible senior notes excludes non-cash interest expense that has been