It is a great idea by the way.
How would you class an eligible miner? Would it just be a rig that would be unable to reach the 0.0001 BTC
It may need a minimum requirement otherwise 30 people with 336Mhs sticks aint gonna get far. Ok, so I exaggerate a bit but you get what I mean.
30 people with S1's on the other hand would be well worth doing.