Shoghi.cc records statistics of website visitors using an open source software called Plausible. No personal identifiers are collected. Collected information is limited to pages visited, length of visit, source (where did you click the link that sent you here), and the country you are visiting from. This data is not shared with any third party, nor is it sold.
For it's subscribers, Shoghi.cc measures how many emails were opened, as of course keeping a record of the email addresses of subscribers.