You and your sister company Nitrobetting blatantly ignored my explicit requests for self exclusion, and then continued to email me promotions after finally agreeing to close my account. DM's to your twitter account and DM's to your bitcointalk account have been ignored. You should do the right thing and restore some of the funds you collected from me after the 2nd, 3rd and 4th request for permanent account closure. Otherwise, your "responsible gaming" commitment you claim is just bogus.
We all know nitro is shit but you playing there is your own problem, nobody will reimburse you any money. Even after closing an account nothing would have stopped you from opening a new one or just play at a new site, so don't blame them for your gambling problems and get some help, you won't see any from this site.
All depends on whether they want to do the right thing, morally speaking. If you say you honor self exclusion requests, then you shouldn't allow anyone to lose money on that specific account after the request was made. It's quite simple.