Askgamblers only want to take money like affilate.
I have to beg to differ for this specific sentence. As far as I know, ADR like Casino Guru, Ask Gamblers, and the likes are doing it for free. They're not paid by referral link if anyone click on a casino through their website, or paid by a casino to resolve their disputes. I think I've read it somewhere on an FAQ page of an ADR, but probably not AG as I can't find it again there.
I'll say it's more to the arbitrator need to realize that ther are wider options to resolve disputes aside from the one they took on your case, than they're only wanting to take money from the casino. I'll have to say, the decision to ask both parties to submit the same documents probably doesn't cross everybody's mind. Thus, your information to AG might help them to improve their approach for future cases and, by that, also help future complainants to get their unjust cases resolved.