Like why do they care how many times I go to porn hub every day or that nothing gets me harder than a free use MILF? Why do they care that I don’t know how to spell consistency so I have to Google it every 3 months.
What the fuck is wrong with people?
It all comes down to targeted advertising. They’ll cluster you and other people with similar interests in groups, determine statistic likelihoods of buying/using/subscribing to certain products or services, and then blow up every channel with stuff you might like.
Maybe a MILF hunter with mild dyslexia is exactly the right audience for cat food and entry level red wine?
The important part being that other companies are very willing to spend a lot of money on targeted advertising, enough to make up for all of the costs of the aggregated data plus a tidy amount of profit for the companies that collect the data.
This is the only real answer. Targeted advertising is more effective (actually true), therefore you can ask more money for it.