I don't know that any platform flags their users as luxurious consumers of any products and it's a first time I know that, from your post.
I guess he meant that it’s his country that will flag him as "a user who uses luxury services". I don’t know about the laws and regulations in his country but I think he is talking about taxes on winnings from gambling that he has to report. Some countries impose hih taxes on such revenues. This is probably why he suggested using crypto for payment to avoid being traced.