This is an interesting idea, but it seems to be limited to publishers that might want to publish anthologies. Multi-author anthologies don't do as well as single-author works, so I would not expect publishers to jump on this. However, if they can see the long-term value of nurturing writing talent, then they might.

One thing publishers are looking for is writers with a solid platform. That means they are interested in writers who can network and build an audience. It isn't just writing ability any more. In fact, some of the most popular works published today show little in the way of quality of writing standards (ever try reading "Fifty Shades of Grey?"). Publishers want sell-able manuscripts, and that really has little to do with quality.

Like banking, the publishing industry is slow to change. How long did it take them to get on board with the idea of e-books? Almost a decade. Then they priced them so high that readers were better off just buying a paperback. Many publishers still price their e-books near the price of their print books. That's because they don't really want to sell the e-book.

An SMT for writers might go over well with publishers if they can see a way to influence the path of the writing. They see themselves as the purveyors of talent. They see themselves as bringing talent and readers together, so an SMT that is geared toward facilitating that process would be much more valuable. Although, I do like the idea of using the SMT to wade out spammers, scammers, and plagiarists.

On a final note, I'd like to see something like this for indie publishers. This is the market I think is more likely to get on board with something like this, as opposed to traditional publishing houses. If you can get Hugh Howey and Joanna Penn on board, all the other self-published authors will jump in.