To Relache; I can understand the duplicity issue. Could be considered plagiarism if I couldn't prove it's my content, or a direct responce (Questions & answers) to my content.
As for the blog-site, I would think that might be considered a conflict of interest, being as HubPages has it's own FaceBook site.
Also, In my case, it would be more like interviews than blogs. Once the interview is published, that would be the end. No more changes.