I can't speak for others, but in the case of this contest the reasons were the following: (1) a 16 slots raffle would not make sense for offering 12 prizes; (2) a 100 spots raffle would take too much to have the slots filled and the contest needs to finish before the end of the year. The prizes are subjected to mixers ban and the topic of the contest would be moved to Archival after the end of the year.
Yesterday were chosen 10 winners, the last one being NeuroticFish, the winner of block 823630.
Let's roll again with block 823695 for finding the next winner!
Last 2 digits of 823695 are 63. Since we don't have this number we'll take closest one => 42. tweetious is our eleventh winner!
Next block: 823698
Last 2 digits of 823698 are 07. krogoth is our eleventh winner!