When you sign in with Patreon from the NPCAI plugin, this service receives from Patreon your Patreon user id, your first name, and whether and when you have supported the NPCAI campaign.
It keeps your Patreon user id, your first name, your support status, the dates of your sign-ins and up to three anonymous machine identifiers (a one-way hash of a Windows installation id), so that your license stays with your PC.
It keeps no email address, no payment details and no Patreon access tokens, and shares nothing with anyone.
To have your record deleted, message Double Hook on Patreon.