I average 40 credit card transactions per month, or about $20/month -> $240/year under SwipeGood's average-50-cents-to-charity-per-swipe model. Assuming that's

I average 40 credit card transactions per month, or about $20/month -> $240/year under SwipeGood's average-50-cents-to-charity-per-swipe model. Assuming that's typical, since the average American household donates approx. $1000/year, a SwipeGood user would be increasing their household's giving by 20%. (Swipegood takes 5%) But it'd be interesting to find out if users ended up giving less outside of SwipeGood because they feel they've "already given"-- or if they end up giving more because they have charities on the mind (giving to one cause is unsurprisingly strongly correlated with other philanthropic activities.) Edit: Also, I think it's great that YC is funding a startup like this. I'm reminded of "Be Good": http://www.paulgraham.com/good.html http://www.paulgraham.com/good.html