“To that end, we have decided to shift our resources away from Yahoo Answers to focus on products that better serve our members and deliver on Yahoo's promise of providing premium trusted content,”
.
Premium = "relating to or denoting a commodity or product of superior quality"
Trusted = "regarded as reliable or truthful:"
Content = "the principal substance (such as written matter, illustrations, or music) offered by a website"
.
As anyone may post anything on YA, and much that should be removed isn't, the content here is considered neither premium nor trusted.