-"ongoing" sounds appropriate for the category.
-As for a solution...the bottom line is that there is a huge, HUGE difference between number of subscribers of comics that have been featured on the front page at any given time, and comics that have not been featured on the front page at all since they've launched. Take any new comic creator (that hasn't had a following somewhere else) and feature them on the front page for a few days in the "new noteworthy" section and of course they are going to have a significantly higher amount of exposure/subscribers than a comic that doesn't get featured at all and slips through the cracks into obscurity.
Maybe a collection is not the solution then, but point blank, being featured on the front page has become "coveted". And if there's a better way to get featured on the front page for even a day, that would help ANY comic out in an amazing way.
Why not try out a section underneath "new and noteworthy" for 'recently updated' webcomics and test it out for a bit? That way it will give ALL comics (not just ongoing) a chance at the front page for a few minutes, maybe gain a few readers here and there i the process. That would help tremendously in my honest opinion.
By the way, thank you for responding and being thoughtful and mindful. I do appreciate all of the hard work that goes into a website as elaborate as this one, and understand the struggles of a new business and taking care of a BAZILLION creators at a time is just incredible, so thank you and thank all of the other members of the TAPASTIC team for everything.