I tried to play one of them but it says that I don't have any balance. Usually, if I have FS bonuses, I can see the message "the FS bonus" is applied.
Hello maydna ,
It is not possible to play with bonuses, so any deposit is required for wagering. However you don't get any restrictions if you have bonuses on Play Fortuna website.
Bonus balance and real balance are separated in general.
If you need any assistance with your account, please DM me with your e-mail + request.