From the HiveWire3D FB page:-

There have been an increasing number of artists inquiring about the particulars of becoming a "Contributing Artist" and selling products at HiveWire3D.com.

We'll have more info on submission guidelines and all of that once our website is public, but here's the gist of it:

We will not require vendors to support for both Poser and DAZ Studio, but we are STRONGLY encouraging it. If you are not comfortable doing both, then hook up with another artist, or just have them help you with conversions....

• Our rule of thumb for our store will be "Quality over Quantity"

• We will have a review process, and will only be accepting what we feel are high quality products

• Products must be exclusive, but artists can sell different products in other marketplaces

• Payment split will be a 60/40 split (artist/hivewire)

• We have an open bonus structure, the more your catalog at Hivewire3d.com sells, the more you earn. Up to 70%. You're guaranteed 60% and can earn up to 70% - this is open to all hivewire artists, not just the top 10, etc.

• No nudity / sexually suggestive / extremely violent promo imagery is allowed

• No overly sexual products will be accepted

As for product specific things, we will have two formats for product pages you may choose from: portrait or landscape.

If you choose portrait, then your main image needs to be a minimum of 500x650 (width x height) no larger than 1000x1300

If you choose landscape, then your main image needs to be a minimum of 800x450 (width x height) and no larger than 1600x900.

Popups can be a variety of either landscape or portrait aspect ratios no matter which product layout you choose. (keep same aspect ratios as noted above, please).

And all products will require a square thumbnail image (295x295).

Please upload at least 3 images per product, 5 would be ideal. You may upload more than 5 images if you like. Please let us know if you feel your product needs more than 10 popups and we can arrange this with you.

As for submission, you can submit products once you're ready here:
https://hivewire3d.submittable.com/submit

Who honors those we love for the very life we live?, Who sends monsters to kill us?, and at the same time sings that we will never die., Who teaches us whats real?, and how to laugh at lies?, Who decides why we live and what we'll die to defend?, Who chains us?, and Who holds the key that can set us free... It's You!, You have all the weapons you need., Now Fight!