if somebody wants to selfexclude from Fairlay, i could buy their old account from them (its anonymous anyways, only email and password, which can be changed).
WIN - WIN
Unfortunately, you are only looking for the account to buy and not helping anyone at all. And the fact that you bought the account doesn't stop the psychological addiction of the gambler which is the context here, so your suggestion is not even good, but selfish. No one will sell the Fairlay account and will not have access to many other gambling sites and even use the proceeds of the money from you to gamble. What has that changed if you would be fair about this?
Needless to say, Fiarlay is not even that serious gambling site but more of a predictive site, except for the added sports kind of betting exchange.