Btw, lemme officially say my exercise entry is up and open for comment and critique.
@Morgan_R I'm assuming you're going to be lax on the time limit for his one, right? No clue how that's going to affect the other challenges. Are the points currently not updated yet? I actually was going to make an imagery suggestion for an exercise. If nmelssx's request doesn't fall under that, it could be a pretty good.
Thanks to ItAintPretty's last piece, I also recommend some type of word economy exercise. Maybe challenge us to write something with a set word limit. When I was a teen, a popular thing was a 100 words challenge. Maybe even a set word count and see what we get.
More character exercises might be good, too. I was thinking maybe something with relationships. Like, you give us a relationship two characters could have, and we'd have to write a scene that portrays that.
A few other exercises I could think of, which may be better for bonuses, are genre-based stuff (ex. Slice of Life only), G-rated challenge (children's audience), censorship challenge (writing with the intent to pass under a set acceptable for an audience criteria), and maybe something limited by setting.