YAPC::NA generally accepts one talk per applying speaker if we have the slots; some years this has meant we've added an extra track or too to do it, some years

YAPC::NA generally accepts one talk per applying speaker if we have the slots; some years this has meant we've added an extra track or too to do it, some years this has meant leaving 20-30% of the potential speakers out. We always schedule at least some first time speakers, because, well, that's how you get your next batch of experienced speakers. On top of this, anybody whose talk isn't scheduled tends to be encouraged to give a lightning talk (5 minutes), and anybody who gave a particularly memorable lightning talk one year is almost certainly going to be accepted the following year. I would expect that a lot of non-profit community conferences end up along these lines; the expensive commercial ones much less so.