Yes it's a code for a single person, The bankroll was around 3000 bits, I've lost most of it

, there is a vulnerability, the max bet is just 100 bits, but the people hacked it to bet more.
The account can be a nice addition maybe the two options can live together. thanks for you feedback

Are you freakin' kidding us?
You should have mentioned that it's a one-time-only usable code and can be redeemed by one person only. However, after knowing your bankroll, I now know the reputation of your website and I'd suggest you to prepare it with a much bigger bankroll before you start to promote it as 3000 bits is nothing and a gambler can win that much in a single bet.