While the web site supports itself via ads, I have no objection to people donating more directly. I get a lot of folks saying they owe me a beer if we ever meet up; well, now they can buy me that beer with a couple of mouse clicks.
I have a Patreon, with $1/$5/$25 per month tiers.
You can also use PayPal to donate $5 one time.
And here's a button for a $1/month PayPal subscription.