A: Hey there!
This is Andrea from BackupGuard.
Thanks for getting in touch.
The Platinum plan we offer on our website contains unlimited websites, but in order to get updates and support, you will need to renew every year, while with the AppSumo deal, you will get lifetime support and updates along with the WordPress Security Plugin.
As you can see, the AppSumo deal is worth to gain :)
In case you will have another question, feel free to contact us again.