Apologies if this has been covered 1000 times before... I’m extremely new bitcoin and only used to traditional bookmakers. I see all this talk about bitcoin sports books only needing a user name and password to deposit and withdraw(also see quite a few that do require KYC too). My question is about these sports books that have no KYC requirements but might offer say a matched deposit bonus. What stops someone from signing up, using that bonus and then signing up another new account using a VPN and getting the bonus again? Thankyou