Re: it will run fine
Um, if data privacy is that important to you then perhaps the internet is not a place you should be spending too much time. Go read a nice analog book, walk in real sunlight, talk to actual people IRL. Hanging around "free" online sites while preserving anonymity is hard unless you invest some effort in it because the default state of things has to generate enough money to keep the servers running.
For example I'm under no illusions that my FB time is being sold, but my FB profile is pretty much comprised only of the things I read because I post nothing so my privacy is not violated too heavily. It's a trade I'm OK with. If you think any data sale at all is a "horrible data theft practice and worse" then you're going to find things pretty stressful for the foreseeable future and maybe you should consider moving in with the Amish.