They have a budget allocated for it and that will make more players to come.
It's encouraging as a player to see such wagering contests and bonuses if the requirements weren't that much or even it's just a free spin as a reward, many will participate and are happy with that.
They are just subjecting themselves to abuse if they will not put some conditions with their bonuses.
They are operating in cyberspace so expect that a lot of fraudsters or scammers will try their hands on if there will be no requirements at all.
The business can easily go down if they will not secure their business first.
Remember, scammers don't care if they will siphon all the money of a certain site, as long as they can pocket some money.
So don't think that casinos will remove their requirements or conditions with their bonuses.
I'm not thinknig about the requirements, what I'm saying is about that they'll keep on running even if they've entirely removed the possible abuse on their end by those users that are there to siphon their giveaway budgets.
Most of the time new casino has been the target of this abuser so no problem with this will occur on old reputable casino since for sure they know how to deal the possible abuse that will come to their platform and maybe put some measure so that they cam assure that people claim it are legitimate players who regularly play at their platform. Maybe newly launch casino should learn from big casino so that they will not encounter this and face a huge problem since this could ruin or bad feedback if they fail to attain those issues.