I will say that every time a Jem thread starts at Shout Factory's forums, it tends to get pretty long. So the interest is there. Plus just google "Jem" and you'll see a bunch of fan sites. Jem youtube videos get a ton of responses from girl fans (and males) around 25-30 years of age or so. So there's definitely a fanbase there. Maybe not as big as Transformers, but definitely on a higher level than, say, your average anime TV series. Heck, if Jem had no fans this thread would've been DOA instead of getting up to page 3.