I have to agree. As a newbie reefer, I fell for this gimmick as well. Definitely the only purpose of this is for a reefer to waste money. Live rock, chaeto, almost anything that you ALREADY have in your feedtank already would serve as a perfect habitat. To mean...this is the equivalent of a pet rock for reef tanksIf you don't mind taking your money and setting it on fire, buy a pod Hotel sure.
Only in the sense that you could make your own with some plastic sheeting from a hardware store that could make you 100 pod hotels for the same price. And then whether they actually house and help increase the populations of copepods is not really documented. If you own a business, and have a 3D printer, makes sense to sell them. But to me it makes no sense to buy them.