Yes, quite a lot. Last year I think it got up to 200 official ones to nab, and each year it's more because of more participants overall. Plus even though there's a race to be the "official" pinch hitter, since it's understood that pinch-hitters have less time to come up with something quality, people are also welcome to write other stories for pinch-hit requests, including shorter than 1000 words "stocking stuffers" you can upload in the last days/hours of the challenge.