The Patreon page says they receive $177 per month. That's too low for a project with such a high popularity and usage. I read somewhere ( and I bet ) it's used by Google / Facebook / Apple employees.
Reminds me of one of patio11's posts somewhere. I don't remember which one, but the gist is that big companies basically can't donate to tipjars, patreons, etc. But if you make it a product with an enterprise option for support or something, they'll gladly pay tens of thousands a month.
I face this with my government clients. They spend very little time thinking of the actual amount (even if it's $30k), and more time about "how are we going to purchase this??"
Tip Jars aren't an effective way to get money for this stuff, at least if you want money from companies. It's good for "aw this library helped me, let me throw in $5" from individuals.