Well, let's take the logical reaction of what will happen when that comes:
-Right before the season 5 opener begins, there ought to be several ads about MLP on TV, possibly attracting new fans on top of the others.
-Newly-mentioned things (such as crystal ponies when they first came) may attract people to make new OCs, and in turn, develop them. Through roleplay.
-Assuming we aren't so obscure that people won't find us after constantly searching for MLP RP sites, they could proceed to find us.
Of course, that's probably total rubbish, since I just pulled that out f the air, and you really shouldn't trust hopeful teenagers making up random stuff. But it's possible, eh?