Adz, I reckon u shud set a timeline for the tournament, say 4 weeks for group stages, then after 4 weeks (regardless of how many matches each person has played) u start the top 8 playoffs. I think ppl will start dropping out if penalised. Also, some ppl tend to get loads of league games in 1-2 days wen they're free. This way, it's in each persons interest to play as many games as possible to make top 8. Wot u reckon 
