I've seen lots of crowdsourced project that I would have loved to drop a couple of bucks on but I never have the spare change to toss around. Crowdsourcing has become a huge thing for musicians, and game programmers and since I have an active interest in both area, I tend to see a lot of crowdsource campaigns.
Just a few dollars or pounds could make all the difference - it doesn't have to be much from each person.... I think it's a great way to make a difference without needing to have a lot of money to donate.
I have been a bit suspicious of it in the past but participated in crowdfunding an art project recently. I felt really good that my money was helping both the artists and the community they were working in and hopefully producing something that will last for a long time. I'll be more open to similar ideas in the future as a result!