Creating another board for Gambling (Altcoins) will water down the strong effect of the gambling board in SEO.
You can simply report projects not accepting bitcoin. Besides, that shouldn't be a sound yardstick. It should only be applicable in the service board if they are paying their campaign participants in any other coin other than BTC.
If a gambling site has announcement on the gambling board not not accepting bitcoin as one of the currencies that can be used for deposit and withdrawal, the gambling site announcement supposed not to be on the gambling board bit on either Service Announcements (Altcoins) or Service Discussion (Altcoins) board. If you noticed any gambling sites that does not accept liability bitcoin, report it to be moved there.