there is nothing wrong with anything related to marketing tricks as long as you are forced to try it then it is legal,, if you are lucky then you can make a withdrawal with the registration bonus that you get, of course, with the conditions that you must follow. don't stop trying, who knows you will be the next lucky one.
I agree with you but users must understand that differen bonuses is just a marketing campagn and advertisement but not a gift or present.