I found it's been a lot more for the convention attend, like a 3rd or more:
anime next had like 2000 people and the masquerade fit about 1000 in there.
The small Bakuretsucon in VT had about 300(?) and at least 100 were in the room/ doorways(trying
to see). And the Otakon...I have no idea how many can fit, but there were a few thousand(might be that 10% at that point). Anime boston was filled (in every way) but it was probably a quarter of the attendees. If it sounds like I'm really exarting(anyone)please tell me!
The more that go, like yourselves, the
higher the participation is, so go for it