Hello!

The game jam system of Itch is so sophisticated and superior. Sure!!!!! There is a huge number of enjoyable game jams hosted on Itch. No doubt. The game jam system allows jam organizer to send emails to entrants of a specific old jam hosted by this jam organizer. This feature is very helpful! If this jam organizer's new jam is coming, this organizer will be able to inform an old jam's entrants the news of this new jam. Thus the old jam's entrants will not miss this new jam. Yeah.

My suggestion:
Assume that a jam organizer hosted 4 jams in the past: Jam 1, Jam 2, Jam 3 and Jam 4. The organizer's new  jam(Jam 5) is coming. The organizer wants to tell this exciting news to all entrants of the 4 old jams. Therefore, the organizer sends emails to all entrants of Jam 1. Then the organizer sends emails to all entrants of Jam 2. Then the organizer sends emails to all entrants of Jam 3. Then the organizer sends emails to all entrants of Jam 4. Since some entrants joined more than 1 previous jam, they are annoyed by receiving more than 1 email about the news of Jam 5. In fact, a few entrants received 4 emails because they also joined Jam 1, Jam 2, Jam 3 and Jam 4. So I suggest: allow jam organizer to send emails to entrants of more than 1 jam simultaneously but "don't repeat".

Please consider the above suggestion. This new feature will be really helpful to game jam organizers. Thank you very much! Thanks again!!!!!!