Checking the jam hosts page, no links, no socials, seemingly little to no following. How exactly does that mean they are a good choice of publisher? It sounds to me like a sneaky way to take a cut from others work.
Be careful is all.
Do you have a source? I just don't see why this jam and the prize on offer would be worth it when they don't even seem to care to build a professional page or any links to socials etc
I see one game published on steam, if thats even the same people, and their game has 1 player. My first steam game got more than that with little to no marketing, just me sharing it myself.
I don't know what's common or not but considering anyone can make a jam, you just need to be on the look out for anything fishy, even in big jams people make alt accounts and all sorts. Honestly this one is clearly just some random person who want to try publish a game, they can't even make a decent logo. I would avoid this and do one of the actual good looking jams with cash prizes etc