The "public demand" of people who are on F95 are not necessarily the majority, either. There are more people who donate to DC each month than who post in any of the Summertime Saga threads on F95. And unless you're on every SS thread on all the other sites, I doubt you're able to make that comparison logically.
Along with that, without a valid poll of opinions, just from observations of people who talk about their favorites in this thread, Debbie and Mia aren't even the favorites of the majority on F95. Sure, there are calls and requests - and they may make up a vocal significant minority - but there are many calls for many others, as well.
And as for your dig at only taking preferences from those who donate: why would anyone poll those who don't contribute a dime - they aren't helping to pay the bills? (that's a rhetorical question, btw)
Again, I don't think DC does things as properly as he should or with good project management skills and sometimes he gets over his head on things - but fallacious arguments don't advance shit except for shit's sake.