I think the reward concept would be awesome.
I feel that the best way to do it is to rank pledges according to how much one gives. For instance, if I pledge x dollars, then my business name should be right there amongst the top pledgers I would imagine. The only thing I am fuzzy on is the ruling about paying once the animal is recovered (or not). If the person responsible is caught, but the animal is never found, we should not be held accountable.
Furthermore, I would like to open up the lines of communication if the animals IS found, because it's possible that I could put away old grudges if I were to be included in any breeding loans etc.
Let's start a fund.