First, it's a mathematical fact that the expected value of Edge is 0.63   D2W will provide the math for that in a medium post soon.  But aside from that, there are several issues why they ask for KYC.  For one as well all know there are a few sites that don't require KYC . Mainly they have some moral responsibility to protect underage gambling and lastly... Virtually everyone has done KYC with a major exchange... You honesty think that when you gamble your address can't be traced back to your exchange withdrawals or deposits and that the authorities don't have this information already (or can get it if they want it?).  D2W does very little KYC, mostly its for age verification, so it's hard to imagine why that would bother anyone.
They are effectively paying people to register!   Do the math yourself... If someone is giving you money to test .. Then it's also reasonable to ask for ID!..
But let me say one last thing... Edge has an expected value of 0.63...it can be more.  I've seen symulations where 1 Edge can end up being worth 15.  And common sense will tell you if you bet 1 Edge on a 180-1, and it hits you will earn 18 ETH in just that one bet.
I hope this puts this discussion to rest.