I believe you should Google that kind of stuff instead of trying to make it a debate in comments. There is no single right move about what to do with the money, but governments are spending billions (including those from these fines) to build their countries https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Government_expenditure_on_general_public_services
Probably because it’s not newsworthy as it’s systematic, for instance Facebook and Googke have had to pay ever ibcreasing fines for GDPR violation, now exceeding a billion dollar, and get in line with the regulation, or get forbidden to opperate in the EU.
They have been getting those fines for years with a delay of a couple of months to pay them. They would have been barred from the EU long ago if they had not paid them.
In my mind that kind of post comes at best from completely naive people that confuse social media with Google to ask basic questions, and at worst someone with malicious intent to make it look like this is an open question that does not have a clear answer yet (while, as you mentioned, it totally does).
We have known for more than a decade now that training machine learning models on huge user data sets allows to predict a lot of things with decent accuracy.
Twitter has been gathering a lot of data on all of its user, it is expected them to be able to predict interests like (and much more) this if you use their service.
No need to spy on your smartphone beside what you submit willingly https://hbr.org/2012/09/use-big-data-to-predict-your-c