Consider status code 10 as a success, too?
Currently, the stats regard only 20 as a success. What about 10? It is not an error. Some capsules have a lot of 10, and they are legitimate.
% lupa-info-capsule -v gmi.wikdict.com
Capsule gmi.wikdict.com added on 2021-02-05 19:50:10.008311 (2 days ago), last successful connection on 2021-02-07 14:04:23.885018 (19 hours ago)
self-signed
74 URLs, 4 successul (return code 20). 9 kilobytes
IP address(es): 188.68.55.202
This one is normal, despite the small number of "successul" [sic] : it asks the user about the word to lookup.