The policy and TOS of casinos can change at any time which if you write something good today and the TOS is 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 There are easy ways to do this nowadays and blogs were made outdated.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.
You’re just stating the obvious and not discouraging and if his wise, he should draw some positivity from this rather than feeling bad.
Op should also understand that most of these casino terms and conditions made it obvious tha it can be changed at anytime even after a win without been held responsible and anyone going into giving reviews should be ready to stay extremely updated on every mover of the casinos they recommend to people as they might be held responsible if anything goes wrong at any point in time.
There are several good casinos you can do a review for but I don’t have to mention but I’ve been wondering if anyone ever did any reviews for local online casinos in my country ?
I will be glad to assist you @op if you ever get interested in reviewing casinos in my country as I’m just a pm away.