I’ve observed a negative trend with some exchange services listed on Bestchange: they now require users to provide their Telegram account details. Given that you already submit other personal information during the exchange process, this effectively deanonymizes your messenger account as well.
In whose interest is this information being collected? There’s no option to refuse — if you do, they simply decline the exchange.
Is Bestchange aware of this practice?
BestChange is an exchange monitor for "AML Complaint" exchangers, so I guess you know what AML compliance means. Once you decided to use an AML compliant exchanger, then say bye bye to privacy and anonymity. I don't think they will mind the new trend, in my opinion. If you want an exchange service that offers full anonymity, then maybe you try looking elsewhere.