Ive one, and it was used almost immediately after I got it. However this article, nor any of the shop pages, or anywhere that I can find about them does it state: How long it lasts, How to maintain it, what to do after insects fill up the holes, etc.

Seems to me that it was in operation for one year, and then got fill up with insect nesting material, and now is inoperable. Not very sustainable if that's the case.

Does anyone know how long they last and what to do after a year? Logically, as far as I know, wasps and bees do not go back to their nest after they are done with them. The nests dont grow and grow. They move on after queens are produced. (Bee hives are man made structures which are maintained by bee keepers)

Bird nesting boxes tend to be cleaned out by birds, or re-used I think. At least some can be cleaned by humans if necessary.