> They allow instant deposits with credit card

This is my biggest takeaway, and I really wonder what payment processor(s) they're using, because the chargeback and fraud rate in filling 'real money' into an online gambling account using visa or mastercard must be through the roof.

Exactly same reason why porn sites use their own specialist payment processors (alluded to in popular fiction in Industry season 4 recently, for instance).

The back end of how they're able to get money "instantly" into peoples accounts must be fascinating, in a how the sausages are made kind of way.