Could you tell me why these key points raise ethical concerns?

Newer Engineering methods that are questionable/up for debate/raise ethical concerns abt social media achieving its purpose (mostly geared towards fairness/consumption data and how it is used) a) //ads & algorithm i ) Survivorship bias (promoting specific things that showcase 'perfection' or more perfect concepts) 11 ) There is a "right amount" to pay to get ads up and anyone can pay that amount (ex. Facebook airing specific political ads) 111) Targeted ads... the fact that social media sites keep your information and use it for their own specific purposes (getting paid more by companies to promote their products) iv) Chronological timelines vs. promoted content first more popular/more likeable content first, which has been an ongoing debate with platforms such as twitter and instagram and facebook, that have timelines b) //money from posting and general fairness of use 1 ) Paid content for business can be good, but can disproportionately positively affect bigger businesses and businesses that manage to play the algorithm better 11 ) Paid content in terms of promoting self influencing can have negative impacts, can unlock more features than average accounts have which makes it difficult for smaller accounts or businesses to benefit, thus leading to a greater disparity between specific groups' social media experiences 111) Monetization of parts of the social media experience (tumblr blaze, subscriptions on twitter, etc.) iv) Specific ex. But insta used to not let you link things if you had