On that average speeds records are being broken in racing all the time. That ex pros comment that the professionalism and training is on a much higher level now than it was in the 90s. And a whole lot of other things picked up following cycling for a long time.
Sorry.
I should have asked a different question.
Your statement mentioned that earnings have fallen since the 90s.
I don't know of any data sources outside of the price money of the Tour de France.
I was wondering if there were different source on which you relied to make that statement?
I commented and answer on that before but deleted it, as I didn't felt like having a discussion about it. Cycling economy is frustratingly oblique. I relied on a host of source most of them not in writing, beside my own calculations on salaries. The academic monography The Economics of Professional Road Cycling claims that cycling has expanded economically since the 90s, while I think that their method is not trustworthy.