The reason why I left negative feedback is because they are intentionally misleading people by spreading misinformation about CoinJoin/Wasabi, likely to attract more customers to use their centralized mixer.
I would agree, if they would have posted in a Wasabi-topic, but they're posting in their own ANN thread.Quote
I would never give negative feedback for someone giving their opinion but what they are doing is intentional and untrustworthy imo.
I think it's a very thin line.Quote
Furthermore, I did some research after leaving the feedback and I found more dodgy things. You already linked to the Wasabi vs Bestmixer topic but they appear to be tainting other people's coins with dust attacks.
I read and discussed the "dust advertising" in their topic at the end of October. This was said to be an advertising campaign. The "tainting" is something anybody can do, and also something you can prevent from your wallet:This can of course be prevented by manually selecting which inputs to use ("Coin control" in Bitcoin Core, also possible in Electrum and no doubt in many other wallets), but I can imagine not everybody uses it.
Here is a quote from their website why there is no information about their staff or company:
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So in short: they are fully anonymous, they don't store your data, they aren't registered under any jurisdiction and they answer to nobody.
Isn't that the same for any mixer? Many exchanges are enforcing KYC, because governments demand it. I don't think a mixer can remain anonymous if they have a known office address.~
So in short: they are fully anonymous, they don't store your data, they aren't registered under any jurisdiction and they answer to nobody.
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Now read section 4 and 8 from their ToS: https://bestmixer.io/en/terms
4. Looks to me like a legal disclaimer, hoping they stay off the radar for US authorities. Where I live, many bank accounts have similar requirements: they don't want to be involved in US taxes.That is a bit weird though when the mixer is anonymous. It looks like it's copied from one of many websites, such as healthmonitor.io.
8. It is getting weirder indeed
They've listed all possible reasons why you would ever want to use a mixer 
It looks like it's copied from Adyen.com
Bitmix.biz and many other sites use the same terms.
I would like to get an answer from Bestmixer about those terms, but none of these were mentioned as the reason for the tags.
Thanks for posting here, at least I know there's more to it than just saying something about Wasabi wallet.