Yeah, this is screaming scam. Even assuming that the above were mostly just typos (e.g. "Diamond Elite" with Hilton just meaning Diamond status), I can't see how they would wrangle e.g. 35% off with Delta, Virgin Atlantic, and BA. If you apply that to a single paid F booking on a round-trip from BA, that'd be like $1000 off. I don't see BA cutting that discount.