https://riseup.net/pl/about-us/canary
Certificate fingerprints deleted for certain domains on Oct. 22nd without notice:
https://github.com/riseupnet/riseup_help/commit/8a8c98e0aaa635130a899c1980569f34633d159d
Page where fingerprints no longer appear:
https://riseup.net/pl/security/network-security/certificates