It would work like so:
Each round would cost each player ~100 satoshis.
Lets say we have 50 players for a total of 5000 satoshis.
Now lets say Player A scores a total of 1000 points and the cumulative total amongst all participating players is 10000.
This would effectively net Player A (1000/10000=0.1) 10% of the entire pot, 5000*0.1=500 satoshis.
Implementing this into online games like CSGO, Fortnight, Dota, really any online competitive game would be super cool. Is there any api or other way we could hook into this? I'd love to see this happen.