I keep track of all the winners and their winnings, even if it's not displayed on the front page.
So when you are up to collecting your cash stack, just PM me in game or join my friends chat, and I can pay for any outstanding winnings
It is quite often that players don't claim or decide they don't want the reward, and in that case I normally add their winnings into the next lotto, and divide it between any winning players.
But keeping track of it all can be a bit tedious especially with work and stuff, so I may just scrap the rollovers, and do more interesting things every now and again, like the sweepstakes lotto we had a couple of weeks ago