Note: AppSumo LTD users are not able to change their emails due to AppSumo policy preventing reselling of LTD accounts.

https://help.logically.app/en/articles/9414579-how-can-i-update-my-name-email-and-log-in-method-on-logically

1) appsumo lets uses change their email address

https://help.appsumo.com/article/20-change-email

2) changing an email once in a few years in my own name is not reselling.