Going back to the OP, here are a few suggestions. I'm a newbie, and could care less about zoas(don't kill me!). From what I've seen, maybe somebody should post a "Let's see your Zoanthid pics" thread. Another problem might be price. I can get plain brown zoanthids for $5, or pay hundreds for a small colorful frag. If price goes down, then interest goes up. The toxins are also a problem, because who honestly would keep something poisonous (not venomous) in their aquarium? Not a first-time reefer. There's also the SPS craze that means that people will gravitate towards the more popular corals, as opposed to the expensive, less colorful, less "reef-like" zoanthids. Just my two cents here.
Disclaimer: I'm not trying to be a troll, and if I cause offense, then I sincerely apologize.