The accuracy of online advertising is a fallacy. All we get in exchange for our privacy being violated is advertisements for products we already own (or decided not to buy).
Tech giants just want your data because selling it to analytics and demography businesses generates additional cash. Companies like Google are more of an ad engine than a search engine these days. They're profit-driven. Ads make their business the most money. Of course they're going to be an ad engine.
We only sell a product at Qonmatic. We will not sell your personal information or data. You pay a modest price to get ownership of your data, which we believe is reasonable. Google Analytics is free, but you pay them in the form of your data.