When selling a site you can reach out to the team to help with removing/deleting the site from your account for the new owner to add it to their account.
The team will ask for 2 requirements:
1- verification- they will give a verification phrase to add as a txt file on the site
2- the site integration must be removed.
If this is an account removal/delete, other verifications may be required and the Ezoic representative will be able to help you.
I should point out that when the site is no longer integrated with Ezoic, your account would become dormant and Ezoic won't be able to affect your site in any way. If you leave it dormant and later choose to come back your site will be ready to re-integrate.