A snippet of a table from instances.social. Shown are columns with "Uptime" (on a percentage basis), "HTTPS" (apparently on an A+ to F scale), and "Obs" (apparently on the same scale). The instances being ranked are not shown in this graphic.
https://law.builders/system/media_attachments/files/109/696/151/245/819/960/original/df6d108541d60d15.jpg