Yotsuba is currently active.
Just two more volumes once we finish this one, so will probably finish it (not counting the possibility of new volumes dropping about every 3 years XD )
But I guess we could have a separate icon for inactive, which can also be used if a series decided to take a planed month off (like December)
Or until interest peeks. But yeah, an of-shoot that is not finished, yet not active could have it’s own marker…
Or should we just sort them by activity level?