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.
Before making a deposit, I study everything very carefully and it will also be a great action to ask the support of this casino everything in advance and clarify any little things that we do not understand, this is what they work for.
I think that many players are always in a hurry to make deposits to start playing quickly to win, but do not even read all the conditions. Sometimes I want to ask them why they decided that they will win even if they cannot do such simple actions. Probably because many players perceive that they will get easy money there and will not even have to understand anything, in vain they think so.