Wouldn't it be better to simply start convincing your friends to use something more open, where you have choice of the client? It feels like solving the problem from the wrong angle…
Ends up with some friends throwing you a bone and downloading / registering for a new service. Some of them remember to keep it open. Some use it. The rest of their friends don't. But a few of them love you enough to use a special app just for you because you seem to care. <3