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As far as I know, all the marketplaces have a license agreement that forbids appropriating a mesh in any way and forbids redistribution.  Now, of course, a merchant or freebie provider could create a purchasable license (or what have you) for use of their models as a resource, which is basically what is happening here :) There should be some clarification as to which native Poser meshes can be used as resources, if any at all.

 

Some vendors sell licenses to use their content in games. That's in addition to the cost of the item itself. One vendor for example, over at DAZ, has two different licenses, one for around $600 for smaller-budget developers, the other around $2000 for larger developers. I can't remember which vendor it is at the moment. The license covers all their content. Or at least all the content listed for that license. So it's not something that has to be purchased separately for each item. But at the same time the license would be required wether you're intention is to just use one item from that vendor or their entire catalog. 

Allowing content to be used in games by just anyone would be cutting the vendor's own throat at the prices Poser content is expected to sell for. So creating a license that covers game content use would be much more advantageous for the vendor. But using that content in a game engine for your own personal use shouldn't have any further restrictions than all the current content available. Game engines can be used to create movies, interactive images, etc, not just games. In movie/rendered format the content is no more extractable than it is from a rendered image. Only in redistributable game format is where the problem comes. But I'm sure there are/will be plenty of content vendors willing to sell game licenses, myself included. It will also give other sites like squid more competition. When you can buy a license to a vendor's entire catalog for the cost of one or two individual models from a site like squid, I'd say that's definitely worth it.

 

~Shane