Errr, hoping the OP isn't meaning to be obtuse or goady. You must realise that people have very personal reasons for creating a challenge for themselves. Why not link the two? It raises far more awareness by doing so.
I ran the Miami marathon after my brother died to raise money for the Royal Marsden and my local cancer charity here where I live (overseas) - I raised $11,000.00 and split the donations equally between the two. I paid for my own race entrance, hotel and flights. I also donated $500 of my own money.
I wasn't a natural runner before I started training and it took a fuck load of supremely early morning runs (3.30am) to get in the miles before the sun came up. I did this whilst working full time, and with a baby.
The point is, is that it was a massive massive challenge to train for something that I found horrendously gruelling, more specifically mentally than physically. I am and remain beyond grateful to those that cared enough to sponsor me, and I donated all the monies raised directly to the ward at RM where my brother died, and to building the chemotherapy unit here.
What I hope the OP is getting at (and what I'm getting at), is sponsoring people to do something that isn't a challenge or is generally something they enjoy is relatively pointless. Many of my friends are marathoners or ultra-marathoners. If they decided to ask for sponsorship, most people would look at them like
- like sponsoring people to grow facial hair. I'm all for raising awareness of testicular cancer (which my brother died from), but is it a challenge to grow hair? That seems to be the point those people that baulk at sponsoring these causes make.
Much like the "sponsor me in dry January" = give you money for you not to drink in January? No.
I think asking for sponsorship when there is a personal challenge involved (like the lady jumping out of a plane despite her fear of heights to raise money in honor of her baby) is absolutely reasonable and I would be happy to do so. Raising monies to honor someone else is noble.
Asking people to pay for your trip to trek the Andes, not so much.
LST - I sponsored three of my friends to shave their heads for Heroes for Hannah (US charity that raises money for childhood cancers) - I don't think anyone is suggesting that people would be offended to be asked to sponsor you. Shaving your head (especially as a woman) is a very big thing, it changes your perception of yourself and is a very worthy cause. Emotionally it is a challenge (unless you shave your head all the time of course). That's the difference.
I don't have time to volunteer in a local charity shop, what with a full time career, a husband that works 70 hours a week, two young kids, two dogs and a home to keep organised, so I do what I can, the only way I can.