Although this not new news, companies like Facebook are free to use as their revenue comes from advertising.
“If you do not pay for a product you are the product” - Unknown
I absolutely agree with you, social networks earn a huge amount of money from advertising while using their own users in this scam. I don’t like the current trend of social networks that try to advertise everything and everywhere and at the same time they absolutely calmly impose various services and consider it normal. Many people realized this and started buying followers on different sites https://megafamous.com to sell advertising and earn money from it. I don’t like too much advertising and that’s why I download various applications that block it, unfortunately it doesn’t always work out. Therefore, I limit myself from using various social networks.