Stonemason makes loads of cash for DAZ. I suspect the days of DAZ and the Poser team playing nice together are drawing to a close. Figure animation has come to most software now so, Poser isn't the only game in town for easy figure animation anymore. Consequently, a mutually rewarding arrangement with exclusivity makes good business sense for the hobby market - which is DAZ's market. That is how business is done. 

The DAZ advances in Studio and Genesis are very good and their product ecosystem is good too. For users that don't want to make content, and considering Studio is free since it's a loss-leader for product sales, I'm sure the strategy is to focus on Hobby and let Poser continue it's integration with Pro software. 

But, these are just my opinions based upon watching things over time. I may be over-caffinated.