I remember someone sharing that Roc dropped several Urban fantasy series over the last year or so, including Rob Thurman's Cal Leandros series. I recall reading her blog where she said she knew of several Roc authors in the same boat as her.
Maybe that was unrelated, or maybe they've changed their focus? Looking at Roc's site, they've got plenty of fantasy series still going, including urban fantasy. So it's not that they stopped that genre.