obviously it is all on a sliding scale (there is no rule making/ sanctioning body) - true self support would be hunt / gather / grow your own food
IMO someone "unsupported" who obtains anything from other hikers (and does not return equal or better) is a fake and likely a bum - a fair price for a MH meal that someone carried on their back for 50 miles should be maybe 40$
of course that is not what will be paid if anything
the beauty of being a "speedy" bum is you always have a new set of chumps to bum from