Just be aware and always read the ToS, casino nowadays are using this method to encourage user to deposit thinking that it will be just a regular deposit bonus. Always read the fine print.
Casinos nowadays are use many ways to recruit many players to deposit, one other way is spamming via email with sweet promises. if the customers are negligent, and can not read properly what they get, they will be trapped. I've experienced with that, after deposit I can't get what their promised because I don't read properly their TOS. So, with this case, I suggest a new player to read properly their TOS, and sometimes I will make sure by asking it on contact support, and screenshot conversation.