Sorry if this is off topic, but I wonder how many people typically donate when they see a "donate" button on a website. I imagine it's very small if any at all. Am I wrong?
One random day I was syncing my blockchain and noticed a ~$10 donation. Made me really happy :)
Unfortunately I'm not even sure what triggered it, but I probably helped someone on an internet forum and he wanted to give back. Thanks, random stranger!
So, to sum it up, according to my experience the total amount of donations on the internet is >= $10.