I have some experience here, having organised, as a volunteer, about 30 cycle fundraising events for Macmillan Cancer Support over the past 10 years ..... I think the thread is perhaps confusing what the charities call "challenge rides" and "sponsored rides"
Challenge rides are invariably the ones demanding what are perceived to be high levels of "sponsorship" - and have a high cost element ... with a confusing area of cross-over between the cost of the event and the money actually going to the charity to use. There is then the debate about sponsors paying for the rider's "holiday" The way that charities run these events is to use a commercial contractor to take care of, usually, the whole nine yards ... at a price - and as suggested some of the things included do seem to be unnecessary (post-ride celebration dinners being a prime example). The returns that the charities get from these challenge events is within a realistic target range otherwise they wouldn't do them. The profile of entrants is very often "cash-rich, time-poor" people - happily paying for someone to provide an event with very little effort required by the entrant ... and these people invariably have "connections" that contribute large sums to their fundraising efforts.
Sponsored rides, usually at a more local level (which is what we're up to) have a relatively low entry cost and encouragement to raise some money (by sponsorship or making a donation) ... but there is no "contract" with the rider for a specified amount as there is with the challenge rides. The downside of the low-ish entry cost is that people pay that, ride and make no further contribution .... there are costs to cover (in our case we have event sponsors in kind and cash - as well as sales of event jerseys with logo sponsors - that minimise our costs and increase the fundraising amounts we achieve) There is a trend towards a "pay to ride" charity event model .... rider pays a bit more for the entry for the organiser to raise a realistic amount for the effort and whatever costs are involved Some events have a dual-scale entry structure : a) pay to ride at £x or b) enter for £y and agree to raise at least £n - the jury is still out on whether that works.
The volume of events, and entrants, does imply that the charity/sponsored event organisers are doing what the market demands and is largely happy with.
Rob