Unfortunately, everyone who has a solution is already using it, and thus cannot see their own karma—and is therefore not motivated by the reward you’ve offered! :)
Well, if at least one of my upvotes is from a person who tested my solution, I would be a partial counterexample—I do look at my karma for latest posts, and although it is not a good motivation per se, using upvote count as a data point for what and when is valued by LW is a minor amusement for me.
Unfortunately, everyone who has a solution is already using it, and thus cannot see their own karma—and is therefore not motivated by the reward you’ve offered! :)
Well, if at least one of my upvotes is from a person who tested my solution, I would be a partial counterexample—I do look at my karma for latest posts, and although it is not a good motivation per se, using upvote count as a data point for what and when is valued by LW is a minor amusement for me.