Well, I've been doing this one at the same period of the year for a few years now, and will continue doing so. Having only one jam for this topic would maybe be 1% better overall, but not much more? =) This doesn't change a lot the situation of people wanting to join. You may simply want to join the game jam offering themes suiting you the best. Also, the other jam is based on notes and ranks. I prefer unranked jams. Feel free to submit beginner games.
Thx for the info, still, I didn't notice that!