You guys realize that after they pay for the venue, catering, & logistics etc, the presenters make no money out of it.
It's ok guys, I'd also be pretty peeved off if I went through a whole career believing and propagating old wives tales about engine management only to be told it was all a lie. Peeved off, but I wouldn't be in denial. I also sure as hell wouldn't be accusing the ones sharing their unbiased data with me as trying to profiteer.