I've been struggling with this concept for a while and I'm not sure would be best. I want to allow people to raise and issue, and then crowdfund a bounty for it. And I think that adding a minimum dollar amount would limit people posting new issues.
But I also don't want the site filled up with $0.00 issues.
If anything, I may do a small minimum. Like $5, so that way every issue has some value to it.
And for #2: I'd like to add in some collaboration features so people could split the bounty if they both worked on the solution.
1) Rewards at this moment do not seem very high, but I can see that improving over time.
2) There are multiple people competing to complete the same tasks as you.