You must be new to scanlation. Nobody pays them per page or chapter or anything, but donate. There's no shortage of groups who pick up something that becomes popular, then gradually slow releases to a trickle, if donations keep coming in, they tend to not bother until enough people start nagging or income drops below a certain level.
And they all aggressively claim "ownership" over series that become popular because they're cash cows.
tl;dr greed ruins scanlation, always.