There was some concern about cheating and bots before... can't say for sure but given that both Lucille and Dark Silence have a LOT of subscribers who just joined this August, maybe Tapas ran an analysis and determined that those were actually bot accounts and thus those series were cheating?
To do a comparison yourself, go check out the list of Lucille and Dark Silence's subscribers and click through them to see when they joined Tapas. Then go to 4th or 5th page of Android Affection and do the same. I think you'll find that while Android Affection's subscribers have a pretty large variance in months/years they joined, the other two do not.
(The reason I say to use the 4th or 5th page instead of the first page is because Android Affection was included in the winner's announcement, which means there were probably a flood of legitimate subscribers right after the announcement, skewing the data. Of course with that said, I don't believe for a second that the lovely @Beau_Van_D would ever cheat~ )