Fair point. But per IoM staistics they seem to have carried some 1300 pax between 19 Jan and 31 Jan, so potential is there to fill a reasonable number of the 6000 seats per month on offer. And yes, its not bums on seats that matter, but yield. And I paid less (but not a lot less) for a return ticket than I was offered by the competition for flights at similar times on the same days out and back.
I confess I prefer the all inclusive pricing. I've never been comfortable with the BE sell you everything unless you opt out website approach. That difference alone will drive me towards RE.
But what do I know? I'm only SLF!