As I am not familiar with Pathfinder I don't know what to say to make it acceptable, other than to just say "hey, play Pathfinder at FG Con", which may still not suffice because the con itself is not Pathfinder specific. Maybe if there was a Pathfinder FG Con which only listed Pathfinder games it would pass. It's their sub and they can run it as they see fit.
Regardless, I've posted it to enough subs on reddit that it should be seen by most people. The rest of the subs combined have around 300k subscribers so that will have to do.

