If one knows the names of their plants, they can buy different ones *for sure* at any time of year. If one knows the names of the ones they saw that they want, they could purchase them w/o blooms on. The names allow folks to find pics of what the blooms should look like. That would probably be the smart thing to do since the deflated demand while not blooming may cause a lower price. Aside from private sellers though, I don't know where one would purchase a 'holiday cactus' since they only have them in stores during the holidays. As said, if one wants to collect names, private sellers are about the only option for most.
I don't buy names, I buy plants I like that look different from the ones I already have, or more of the same if they're not propagating as fast as I *need* more of them. Nothing wrong with names, which positively ID a unique individual, and give the proper credit to the person who 'created' it (and some of them are a lot of fun to say!) I doubt many people have room for more than one of each color they like, regardless of name. Like one red one, a white one, an orange one... if I see 7 different looking ones, I want 7 plants. If I see 62 definitely different ones, I'd want 62. I hope this doesn't read as snarky, which I don't intend at all, just the ramblings of one plant-o-phile to answer a question asked.