Google etc track literally over 3 billion people - unless you are mega rich or high up in politics, business etc, there's almost no way a human's going to look at your individual data. It's almost entirely used just by machine code (AI) to make them more money with advertisers. Totally harmless in my opinion.
If it bothers you , use a more private alternative (e.g. the DuckDuckGo search engine, and one of the more private bowers - e.g. Tor or Brave instead of Google Chrome.)
As for this site, my guess would be they don't allow VPNs, & they store your IP address. The reason for both being is it helps defend against dodgy characters like White Knights coming back after their perma banned.
Extremely unlikely they'd share the data with anyone else IMO. That's just based on my spider sense that old admin was a decent sort, and that so are the folk he handed over the site to. Could be wrong. If you want to be 99.99999% sure of your anonymity, you maybe need to invest many hours in learning IT & security, or pay someone to give you advise.
Personally I've not bothered to learn all the details, and if even if I did I'd not explain it all on a public forum. That sort if info could end up helping trolls & White Knights!