LW may be interested to learn about Amazon Smile, which gives 0.5% of your Amazon purchases to charity, and the Smile Always Chrome extension that will route your browser to smile.amazon.com by default. (Yes, you can support MIRI through Amazon Smile.) Total setup time estimated at under 5 minutes.
Oh yeah, it looks like they're having some kind of promotion where if you sign up and make a purchase by March 31, they will give an extra $5 to your chosen charity.
I have been using Amazon Smile and Smile Always for MIRI for about a year.
IIRC, Amazon Smile used to be listed on MIRI's Donate for free page, but has since been replaced by "Good Shop". Good Shop appears to give a higher percentage, but I was unable to get the browser extension working so that it happened automatically, so I still use Smile. If anyone knows of a way to get it working, I'd be happy to hear it. But I tried to do it manually for a while, and I just don't remember often enough.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Duration set to six days to encourage Monday as first day.