Do you think it is the obligation of casinos online or offline?
No I don't think it is the obligation of casino to establish a site for gambling addiction cure or whatever it is that it would be called. It is already in the terms of the casino not being responsible to the effect of gambling at least I know it is there in offline gambling.
Moreover, there are some agencies and NGOs that deal with that, so I don't think it would be mandatory for casinos to go into that. And gamblers gamble because they want to win from the casino, they should rather stop if they won't gamble responsibly.
I was also thinking casinos are in business for profit and that if they sponsor such site, it would cause them to lose customers but however some people will still gamble despite whatever warning. So it is just would be a futile exercise, as people won't gamble responsibly, they will keep going in and out of the site or help center.