I applaud your desire to help others.
I've donated to both Heifer International and Samaritan's Purse. Both of them do good work. I favor Samaritan's Purse as it is a Christian ministry (not to mention it scores better as a charitable organization), but some of your customers may not like that.
While I understand the desire to fight against cancer (both of my parents died of it, and I have had it), I am frankly skeptical of the good that donations to any national disease organization (cancer or otherwise) would do.
Whichever organizations you choose, I strongly urge you to investigate them using Charity Navigator, which can at least tell you if the money is spent wisely (what % is actually given to the stated purpose, as opposed to administration and marketing/advertising/soliciting more donations).
https://www.charitynavigator.o... Ideally you would like to give your money to 4* organizations, but I confess that I support a few 3* organizations myself, because I see the need and almost no one else is fulfilling it.
