At first sight it seems a good idea to me but I dont think bitcoin payment is gonna happen and additional features on their profiles dont seem too motivating for me.
Give an incentive to the Merit Sources for them to be proactive in achieving their quota.
They are merit sources and I think this is the biggest incentive. It's the honor, recognition and privilege.
What makes you think (your are sounding like you are not happy with them) that merit sources are not doing their job correctly?
Some of them aren't sending all the smerits, even some are not too active on the forum.