Maybe there's a financial/business reason why this unnamed marketplace you speak of is requiring new vendors to support Dawn? 

I don't particularly care for Dawn either, but I'm still building content for her. I don't care much for V4 either, but she's the figure that most of my clients use, so I build for her too. In the long run I'm just making things a bit easier for me anyway, as everything i build will be adapted to fit my own figures later on when those figures are ready for showtime. (at least the content that isn't licensed exclusively by the clients I've built it for).

If you build content as a hobby and want to do your own thing and spend your extra vendor money you earn on more toys for your hobby then use whatever you want. But if you're an artist trying to make a living then you have to build the content that sells, whether you personally like the figure or not. Otherwise you don't make money. 

I think its silly and self-defeating for a serious vendor to refuse to build content for a figure just because they don't like that figure, for whatever their reasons are. But that's up to each vendor to decide on their own.

 

~Shane