btw. what prevents currently active coordinators from continuing to do the same thing, blockchain analysis and spying
Short answer, there's no way to know if any data actually logged/stored on server used to run CoinJoin coordinator. But WabiSabi (name of the CoinJoin protocol) ensure the coordinator know as little data as possible about it's participant. See,
https://github.com/WalletWasabi/WabiSabi/blob/master/explainer.md.
Wasabi Wallet
stopped being a coordinator on June 01 2024. When o_e_l_e_o posted on Jun 21 2023 it was correct because zkSNACKs were devs & coordinators. The naughty coins parameter with Wasabi Wallet doesn't exist after they've stopped being coordinators.
Wabisator's got 4 coordinators in the list ppl will have to add one if they want to use Wasabi Wallet.
For some reason though, it looks like the whole traffic is going through one coordinator. Wouldn't it be better if the rest of the coordinators were used as well?
It's probably because Kruw is active on Wasabi Wallet community for many years, while people/group behind 3 other coordinator is newer or less known.