On a smaller scale a bloke I know with his girlfriend recently did a tandem sky dive and they raised £700 which sounds quite admirable but the problem was they had to pay £400 of it to do the jump.
If I go back to the 80s I did my first jump with 19 other people and we collected £1,100 but we didn't know that our training was £50 each until after we did it.
In my opinion if you're doing a parachute jump for charity then you should cover the cost of the jump yourself, not from the donations.