Hope it surpasses 3000 by the end of the month.

I've been wondering, is there a way to tell whether or not a game is premade?

How much attention do games, not made in the Jam's timeframe, receive?

Will games that follow the jamly theme be the ones that get featured?

"I've been wondering, is there a way to tell whether or not a game is premade?"

Honor system. Making sure all the source code is on GitHub (and checking the timestamps). Also, googling a game's title and checking a creator's accounts, if it comes to that.

"How much attention do games, not made in the Jam's timeframe, receive?"

Little to none, ideally?

"Will games that follow the jamly theme be the ones that get featured?"

Yes, one of the scores is theme interpretation.

I dunno, check out last year's top-rated games. The theme last year was "Moonshot" - are there any higher-rated games that you suspect of being premade, or ignoring the theme?