I'm currently writing a challenge which forces people to work in pairs to participate in the challenge. However, this leads to the question, who wins in the pair?
I'm thinking about (ideally) having a popularity-contest (don't boo until after reading the challenge), where a pair's score is the sum of their upvotes minus the sum of their downvotes. But this would lead to two people winning the challenge. Is this OK, or can only one person win a challenge (ignoring ties)?