I heard several weeks ago that it had become free. I guess they decided to try a different business model. I joined under the free provision and am seeing no new or different shops. Rather I seem to now be getting an extra set of emails for jobs I already knew about it.
While I'm not using Premier to find shops for myself these days, I do use them extensively (as do hundreds of other schedulers) to find shoppers to fill shops. They're a great resource for both shoppers and schedulers.