Almost the majority of game provider is already available on all casino including the small one. I believe they are in package deal once you purchase a casino program to a developer. The purpose of this thread is clearly stated on the OP. They are looking for a client casino but rather they want to connect to all the players to answer question, receive feedback and to attract more user to use there slot by doing some announcements here. The competition of game provider is very tough because they are already saturated on the casino. Endorphina is one of the old slot provider that I know that still exist but new providers is now dominates the market with there new flashy slot games.
Not all. Till now I can see some casinos who prefer to have their own games rather than hiring a gaming provider to supply them with games. Casino providers are a package deal. They offer a game so they are also the one that will troubleshoot it in case some glitches or bugs are experienced by the players.
This is my first time seeing a gaming provider to have an ann thread here in the forum but it's a nice move so that players who experience a problem using the games they provide can just go here directly to consult the problem than contacting the customer support of the casino that they are playing since it can be delayed due to the amount of concerns they are getting and solving.