Although the signup bonus seems to be able to attract players to register, users still have to be careful because many new casino sites provide sign up bonuses but with applicable conditions. We may often see some users have problems with the signup bonus where after they get it and use it to play some games and can win it, the casino immediately proposes some conditions that must be met by the user. In this case, the user will feel fooled by the casino for not knowing the applicable provisions. Therefore, be careful if you want to look for sign-up bonuses.
Recently, I found out that Bitlucy which is a new casino gambling platform in the forum made an announcement for their online games which has I also registered
https://bitcointalksearch.org/topic/bitlucycom-100-deposit-match-7-euro-free-bet-777-users-5395791 and $10 free bonus was given to each user that registered with them to play Games in their platform. But you can not withdraw the $10, you can only use to play game. Their are some or all the platforms always give terms and conditions for the bonuses. I do not think that casino gambling sites will allow a player to withdraw the bonus without playing any game. Some sites even give conditions for withdrawal. If you did not have a specific amount of money in your account, you can not withdraw it.
So with that, some players will play like 3 or 4 times before they can withdraw the win. Sign up bonuses are just a bait for greedy casino gambling games players. If you really want to play Gamble remove your mind from bonuses.
To be fair, some of those restrictions are well-thought since they don't want users to abuse and start reg up a bunch of accounts just for free $10 on the signup bonus. Of course, they're casino gambling websites, they can only make the money if you start playing their game. You have to prove that you're worthwhile if you want that free bonus on the house. Not just sign up, take the money and just leave the site. Too many restrictions, though, then like you said, likely trying to set up users for information or force them to play the games, wasting money on just the promise of earning $10 free. That's why I also didn't fall for those bonuses when gambling sites did it.