Similar to this suggestion, I’d like to be able to follow a jam so I’m notified when it’s over. Sometimes I see a gamejam that I don’t want to enter (or the rules exclude me or whatever), but I do want to play the games when it completes.
For now I guess I just join jams without intent to enter, but I feel like that does a disservice to the jam runners who may get excited by an inflated number of jammers and disappointed by a relatively low number of submissions.