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Visting a website means your IP address is sent to several systems. We make no effort to retain it anywhere.
Donors (see Terms and Conditions) have their Patreon/GitHub display name appear in the "thanks" section of some articles, unless they opt out of it (only GitHub lets you mark a donation as "private").
Cancelling donation makes the name disappear (automatically) from those credits.
You can e-mail firstname.lastname@example.org if you have questions.