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.
What a nice advise, i always made mention that it is very important that we look well into the conditions attached on every offer they are giving us before we apply, most especially on their ToS, we shouldn't be enticed alone, but we must know what's in there for us as well as the conditions attached before we give on for submission, as part of paying negligence to things like this, we have seen a number of gamblers complaining scam on casinos without knowing they are the one actually at fault.