What free T-shirt offers do you know about?
Curious what free T-shirts one can earn these days. I mean earn, not win as in random chance or in a contest but rather offers of free shirts you can earn.
Here's a couple I know about:
(1) Run a TOR relay: https://2019.www.torproject.org/getinvolved/tshirt.html
(2) Getting to Sage level on he.net's ipv6 certification: https://ipv6.he.net/certification/