Have to pull you up on that one - it's a bit harsh and doesnt reflect the value of the majority of CLs to QF. Many may not do the travel, but run businesses who have travel policies, sponsorships, commercial arrangements so QF
I happen to be related to a CL - he gets a letter every year thanking him for his custom - usually with the addition of something like "in our top 100 FFs" or even "top 20 FF's" some years. Suggest that's more than most (with ~5million FFers)!
I'm sure you're quote was meant in part to have a go at those you feel arent worthy of CL (i'm guessing politicians and the like), but many, many CLs earn their CL over and over again in flights and other business for QF.
$0.02 = mine