This is the kind of discussion I would love to see on the "Termite Rearing Thread"! as for the Termitat, I didn't know they came with reproductives. that is unbelievably awesome!!!
Officially they do not, nor is the other site supposed to either.
However, they send nymphs/workers and sometimes soldiers. The young workers AND the nymphs, maybe even the older workers (not entirely sure on that part)...they can transform into reproductives and produce a viable colony. Often times out reproducing a colony with only a single queen. However, Dampwood termites themselves actually don't have a true worker caste. They have nymphs, reproductives and soldiers. So, them not sending "reproductives" feels more like a loophole style phrase than anything, since legally they (pretty sure) wouldn't be able to send actual reproducing termites. Possibly it means they do not send the actual queen and male, but for Dampwood termites, that actually matters little when the nymphs can turn into reproductives anyway.
Its possible its mostly overlooked because (at least for Dampwood termites), they need a VERY niche environment to live in and the chance of them becoming invasive is near 0%. Subterranean termites that one store sells is a bit different though, because Subterranean termites often can live in quite a variety of environments. Though for Subterranean termites, I don't think the older workers can actually turn into reproductives. So if the store only sells older ones, probably would never reproduce. Still, them selling Dampwood termites that can (very easily in captivity) reproduce feels like a loophole to me, since they'd be sending them to various states that would otherwise not even have them.
I wonder if any of the experts on the forums have anything to say about it, or if its just one of those things that isn't a big deal because Dampwood termites need such a niche environment. Though thinking about it, I can still imagine them doing good in a place like Florida (like the Drywood termites are doing good there last I read, and they aren't from there at all).