Have you thought about teaming up with eBay or some other giant like that? I know they ask me to round up/add a £1 extra to give to charity. Although i think the monthly subscription is hassle free, you'd get much more pocket change like that, which would compound. I'm not sure how you'd get listed there though.
Edit: i see the tip option while subscribing which is better than nothing
People are generous with tips, which is awesome and helps a ton. At this stage, we're 100% focused on raising money for patients. But down the line we'll likely start optimizing more for tips as well, in hopes of becoming self sustaining (https://watsi.org/faq#how-do-tips-work).
Have you thought about teaming up with eBay or some other giant like that? I know they ask me to round up/add a £1 extra to give to charity. Although i think the monthly subscription is hassle free, you'd get much more pocket change like that, which would compound. I'm not sure how you'd get listed there though.
Edit: i see the tip option while subscribing which is better than nothing