With 1600 players and a 50% win ratio at an average of 150 favor points per win and 10 per loss would mean an average of 80 points per game per player.
When stats started to be recored again albeit not really correctly, Light had about 250k points to go and the patch was released about a day and a half before the tournament reached 500k.
250000/(1600*80) = 1.95 games per person / 1.5 days = 1.3 games per person per day.
That is with a 50% win; since Light had to come back from being down about 40k points and ended up wining by what 20k-30k points lets say they had a 60% win ratio. That would up the average favor per player per game on the light side to:
150*.6 + 10*.4 = 94
250000/(1600*94) = 1.66 games per person / 1.5 days = 1.1 games per person per day.
So really I think the point total probably needs to be upped to 5 million or something to make it last longer than a day.
NOTE: I think I have all the numbers right, but since they are from off the top of my head and this has been a horrendous work week for me, I apologize if I missed something in the calculations 
