User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-168.169.25.92-20151104231630/@comment-24834479-20151105005906

1. I believe that as a demon, he felt he needed to make a deal, as he usually does, in order to bring about special children.

2. I think the idea of him being a former angel is very insightful and interesting, and would love for it to pan out. That is a possible reason, sure.