I have made some series of research on the said topic, but all the same. For the ones I have searched, the bonuses go with the deposit, that means, without deposit, the bonus is locked as well, you have to deposit on the agreed amount to unlock the bonus. Which I have not done that base on lack of fund. But expecting to do that whenever I have cash to unlock the bonus.
Although, I created the thread to Know the reasons why the bonuses can not be used. Because I was thinking that, as I registered for the site, the said advertised bonus will be used without depositing, that made me to sign up to the sites. But ironically the bonuses are not utilized without paying infact there is no free game in my research.
That conclusion of yours should be an obvious thing.
There's no way a gambling site will offer a deposit bonus then there are no requirements on how to claim it. Sometimes it is not just about real deposits by users but that bonus should be wagered by certain requirements. Even how far your research, you won't see a site like. Even scam sites will ask for deposits to claim their offered bonus.
There's no free money. The sign-up bonus is just a perk for us to try the site and there are no chances that they will give it for free, of course.