when a gambler is looking for a wager-free bonus in such a way that they can just deposit into the casino claim the bonus and then withdraw, not knowing that such a casino does not exist and if you see any casino that offers such too good to be a true offer, there is a high probability that their end up scamming the gambler.
No trusted casino or any trusted service would offer such thing. A wager free bonus that you can withdraw immediately after making a deposit, no string attached, is the same as those well known bitcoin doublers.
Any reasonable person must realize that there is something fishy when they see an offer like that because why would the casino give you money for free, what are they going to earn!