Sub Only Tournaments

Have any other MAPPers competed in (or want to compete in) submission only tournaments? I have done two (gonna do a third next month) and honestly it is my preferred rule set when it comes to Jiu Jitsu competitions. When the rule set is sub only, the stallers who try to get wins by doing a single thing and run away, are forced to engage.

It really promotes the finishing aspect of Jiu Jitsu which I believe is the true spirit of the art.