Perhaps a stupid question but, is it so difficult to make a Poser version ?

The work involved for building and a set of materials, yes. Keep in mind you're doing the work twice, and maybe getting less than 1/5 the return.

It really shouldn't be a big deal to at LEAST fix the OBJs so they load up in the right place WITH the textures loaded on. If making a proper Poser version is so hard, this shouldn't be a big inconvenience. 

Having untextured OBJs at the origin position is a requirement from DAZ Quality Assurance (probably because it can create problems down the line and for additional functionality).  I don't think big stores (like Stonemason) base their decisions on a number of forum posts. They have access to a lot of sales data and I'm guessing that is where they see the problem.

And again, DAZ leaves it up to PAs whether or not they want to support additional programs (though Poser used to be a requirement, it isn't anymore I think). Everybody makes up their own mind about that.

PS: Are they OBJs still that way when you export them out of DS?

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