I guess I am a odd-ball in 3d because I am having same issue with a few competing stores too.  I like to shop and buy 3d content in advance of need.  I build a library of assets and when I get inspired I draw from it.  On times when I need a specific item, I will hunt for it in stores.  If its not priced as 3d content - I have considered it unavailable and whip up something suitable in ZBrush.  

I dont have a need for a particular item today - I just would like to take advantage of shopping oppertunities.  

What I cant get my head around and what NO VENDOR has answered logically is "what is the difference from a vendors perspecective if a consumer publishes pre-rendered work vs real-time rendered? (on web page or discrete application)" Its been discussed before but denial kicks in before the bottom line conclusion is realized: threre is no difference, based on the greatest 2 concerns:

If concern is asset "bootlegging" a requirement where store's original product is NOT included in distributions but rather limited resolution proxy assets (like 90% mesh decimation and tex reductions) could easily accomplish this risk snce nobody could rip and sell the original.

If concern is loss of potential royalities on a big game commercial release,  its no different compensation than if a 5 star production house made a 2d movie based from the stores' 3d assets.  No sale also means no oppertunity.  Furthermore this can better be addressed in both publishing mediums with a royality or revenue share based program.

However its most important to scope the risk and understand how MOST consumers will take advantage of the oppertunity.  Its not games, but 3d scenes, virtual e-cards and social media virtual worlds (avatars). 3d real-time rendering has become ubiquitous on the web with WebGL supported by every major browser and phone/tablet so more people will want to make virtual 3d multi-media scenes for these platforms as demonstrated by the shift in Flash Professional's toolset.

 

So why NOT encourage people to get MORE VALUE and LONGETIVITY (future proofing)of thier 3d content library by enhancing it with 3d publishing licenses.  Its means more FOCUSED sales (shop for supported assets) and a BROADER market to exploit.