The policy and TOS of casinos can change at any time which if you write something good today that the TOS was changed after just a few days, your review might just be the reason for someone who got into the mess. You must be very updated on what changes have been made to the casinos that you have reviewed.

Not trying to discourage you with this but that's just my suggestion. There are easy ways to do this nowadays and blogs were made outdated. It's called Vlog. You can do it on youtube and gain followers and you can still monetize.