Wow. Not that I have ever heard. Are you sure that is 2018? I have ordered from them before and they have never entirely booked out. Some choice ones, yes, but not all. I just don't seem able to grow out their small plants - they don't send tubers (at least when I ordered) they do cuttings and send two to three inch plants in little containers. like a tiny greenhouse.
Trademark. That is the term. There are a slew of them on the right hand column of new plant pictures.