I think that Zodac's non immediate sell out is a product of both lower demand for the character, and overall less quality compared to the other figures. I truly believe in my humble opinion that Zodac is the weakest figure thus far in MOTUC. Not bad by action figure standards, just not as good as the others. Let's examine the sales history and the reasons for each result:
1. December- He-Man shockingly sits around for almost a month while us MOTUC preachers try to convince everyone to rush out and buy him. It takes over a month for Beast Man to sell out. What are the factors? First of all it's the holiday season, and money is tighter than usual anyway, secondly, word is not yet fully spread to the mainstream collectors and scalpers. Also, He-Man is produced in larger quantities than Beastman and others in the first few months
2. January- Skeletor is the first legitimate success, selling out in about half the time of He-Man if I remember right. The reviews and publicity for He-Man and Skeletor have effected scalpers and mainstream collectors alike, coupled with everyone's love of one of their fav childhood villains.
3. February- Stratos sells out in a day. Amazing, collectors everywhere are taken aback. We'll never really know who the driving force behind the sales of this secondary character was, but it's possible scalpers capitalized on the Skeletor incident, or maybe there was just more fans of the character than anticipated. However, I suspect his sell out had more to do with new fans trying to jump on the bandwagon after hearing about the sell outs, or perhaps even MOTU fans who had scoffed before realizing that this thing was real.
4. March- Faker is available in low quantities because of his con exclusitivity, and sells out in an hour. Probably the fastest sell out of a re-paint ever lol. I think that perhaps there were many in the mainstream not aware of the limited quantities and so the press generated by his apparent sell out really helped solidify the line as a huge success.
5. April- Mer-Man is perhaps the first "cult" fan favorite character to receive a figure, and it shows. He is the first figure to get an increased production run. Mer-Man's first production run sells out in mere minutes, while his second does the same. A great figure, a better value (extra head, more original sculpt work (vest trident, etc), and a huge cult following made Mer-Man and instant success. Expect the same to happen for Hordak.
6. May- Zodac is released but in my opinion, he is much less aesthetically pleasing than the ones before, not to mention he is without the cult following of Mer-Man and he has less original sculpting than any to come before (besides Faker), his look, while based exactly upon the original (flesh toned skeletor arms and beast feet) leaves me feeling like this figure was almost exploitation for how far Mattel was willing to go to save on sculpt costs back in the day. In my mind, I definitely see Zodac without the arm fins and monster feet. These factors lead to a delay in the sell out and we're not sure when that will happen at this time. Although I make it out to sound like he's a failure, he most assuredly is not and will probably be sold out in a couple of days if not less, I'm just trying to justify what could have happened between the ultra fast Mer-Man sell out in minutes, and the now forthcoming days sell out for Zodac.
Predictions: Hordak will be huge, much like Mer-Man. He-Ro will be a struggle just to get ahold of for every single one of us. Man at Arms will be a big success. Tri-Klops will have similar sell time as Zodac. And Webstor will be an easy sell out due to his inclusion in the subscription service, a huge limiting factor on the quantities available to the non subscriber. One can only hope Mattel is ready to increase the number for the 4 remaining figures.
Overall: What can I say, I'm stunned, I never would have expected this line to take off the way it did after the halfway sluggish sales of He-Man and Beastman. It makes me happy to know that collectors will respond to good product no matter what!