Yeah, and most of the average poser users don't like to import OBJ's, especially since it often means that the textures need to be imported separately, through the material room.
Most of the users that knows how to do thid know how to make a skybox too, and most of those whom don't, will get very frustrated.
At the minimum I would package the skyboxes in Poser native format, so they show up on poser content menu upon install, rather then the obj's that need to be imported.

You'll often see many poser users pass up a freebie because it's in an obj format that needs to be imported.

Not to say that your product isn't any good, it's just that the poser content buyers have rather specific needs and interests.

Also, when talking about skyboxes, poser has the ability to render something against a background image, which is a little like a built in skybox.

Hi, my namez: "NO, Bad Kitteh, NO!"  Whaz yurs?
BadKittehCo Store  BadKittehCo Freebies and product support