The main idea behind such bonuses is just to lure in more customers, there are lots and lots of casinos that keep emerging every moment, in order to stay afloat in the business they have to introduce some sort of innovation that keeps their customers coming back.
And one of the ways to do that is by offering the bettors some unusual bonuses as these, though these bonuses often comes with rules that must be adhered to in form of terms and conditions which may not appeal to the customers anyway but they still go a long way in promoting these casinos to an extent.
I will not blame them honestly, it is their own business strategy to get customers to patronize them if anyone should be blamed it should be those that already know what they are up to but still decided to try their luck, it is normal though, new businesses actually gives offers to attract people and get them to patronize them but this charity does not last longer because the longer it continues the less profit they get, so I believe after they have succeeded in getting people hooked up in their business they will return to their normal method then it becomes difficult for some persons to leave without losing to them because of a new policy they used as an excuse for their tactics.
