custom: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=PZBZDFNKBJW5E&source=url

custom: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=PZBZDFNKBJW5E&source=url
open_collective: pudl

Add Open Collective sponsorship link.
Add Open Collective sponsorship link.
