Exactly. Cash isn't considered a "good" option of merchants for most countries nowadays, because there are regulations that make them believe so. In my country, Greece, it is not legal to make a purchase worth of beyond 1,500 EUR with cash, as they say, to avoid tax evasion. You must only make it with bank accounts, credit/debit cards and cheques.

But, cash is used to protect your privacy, and therefore this regulation can be translated to "forbidding privacy protection to avoid tax evasion". If you want to get goosebumps, check other countries' cash payment limitations: https://www.europe-consommateurs.eu/en/shopping-internet/cash-payment-limitations.html. If your country doesn't have a limit yet, be sure that it'll someday do.

I'm stop trusting BestChange, and this incident was just the icing on the cake. They've been advertising other services that treated bitcoin as non-fungible in the past, with no problem. They even added a rule in which they recommend against talking about Ukrainian war, just because one of them had a political belief a stranger didn't approve of.

They put profit above business integrity.