I would definitely be down to participate in a HIVE Game Jam some day. That would be super fun! So far the only game jams I've ever participated in were GGJ.

In lieu of a large HIVE/HBD prize, you could create some NFT awards. I believe you could do that with Hive Engine, create a few awards like "Gold Medal (Hive Game Jam, 2021 Q1)" that you send to the winners and "Participation Medal (Hive Game Jam, 2021 Q1)" awards for everyone who enters. I'm sure people would find that enticing enough to join.