Your theme sorry i do not understand you like to mention any problems you desire more information so I can answer to help you
Hello dear ! You can use this bonus amount to play games for free to get their experiences. And keep in mind that you cannot use this free amount to make bets for real money. This is one kind of virtual money that cannot be use where there is a need to use real money. And of course you can also not able to withdraw this money.
And the 2nd thing for which you’re asking is:
If you have joined any Casino for once; then there is no any way that you can re-signup for that casino. So if one Casino suggest your some of Casinos for which you’re have already get registrations then there is no bonus for you.