Since yesterday a lot of users in Europe found their workflows failing due to Github seemingly randomly throwing HTTP/401 on git clone/git pull when interacting with public repos without authentication.
It was now confirmed by staff member that this indeed is intentional and no further steps are planned at this point.
Codefloe is very nice and fast, and their CI can do Jsonnet instead of only dumb YAML.
Sounds interesting, thanks for the tip!