There you are, some free info from the horse's mouth.
It's worth what you paid for it!
No, I think it is worth vastly more than that!
Admittedly it was quite a long while ago but I was involved in dealing with this as a committee member of a gliding club. Also, as a basic instructor, I flew quite a few of the punters.....
From the club's point of view it was a worthwhile source of income. However, the big difference was we were all volunteers so there were no labour costs.
As a business, it is very different.