It does feel very weird with everyone going down the "rate for rate" route that it kind of undermines the purpose of a game jam. Yea we want people to check out our creations that we put a lot of effort into, but it just doesn't feel like the way to go about it and hopefully no really good games gets overshadowed just because they never did any of it.
True. It's a bit wierd to see 4-seconds-to-beat games with 100+ ratings and interesting concepts with great implementations of them with like 10-30 ratings. But this may be no problem with it because this is not a really serious jam with some kind of a valuable prize. Like, it's not Ludum Dare where you can really use all of your skill and bring attention to your idea. I would say that Brackey's jam is more for learners audience.