What think you of bingo-style fic-challenge games?

Those of you who enjoy bingo-style challenges, might you tell me a little about what you enjoy (and don't) about them? Do you feel community engagement through the game? Do you feel quite independent? Do you read other stories written for the game? Do other players read your stories? What does the bingo-style do for you...?

I'm thinking mainly as a fanwriter who would like to write more and better herself!

I'm also thinking about ways to make FKFicFest work better, easier, more smoothly, more fun for more people. We've always done exchange-style, in a manner that was customary a decade ago. Things have since changed in fandom practice and expectation. And with only 8 players last year, the logistics of matching are both easier and impossibly harder, under the old model's expectations. (I'm entertaining as many notions as I can gather, but am really thinking more of a "use any 2 of these 3 prompts" challenge than a bingo card.)

Thanks!