I was told it is for new accounts only at betcoin.ag or playbetr.com
Support also said if you have an account already at betcoin, you are allowed to register at playbetr.com and claim it on a new account there. Both sites owned by same group.
You have to go on live chat or send a support ticket and use CODE: 100DEPOSIT to claim the 100% cash
Does anyone know about wagering limits at either place ?