Well IIRC username: banker was used by an Indonesian scammer account farmer earlier. I don't find any related gambling accounts with that name now. Somehow I felt that this had some connection with that since both are Indonesian.
There is a user at crypto-games with nick
https://www.crypto-games.net/player/bankerBut I think they probably just posted a name they saw earlier in the thread to build post count and activity as marlboroza suggested.