Do you know that both [email protected] and [email protected] emails work? Whichever you use, you will receive all your emails in your Gmail inbox. This way, you can sign up twice for any website without creating another email account.
Additionally, if you want to sign up more than twice, you can use [email protected]. You can add whatever you want after the + symbol, and you will receive your emails in your [email protected] inbox.
This is particularly useful when you want to sign up for a website more than once without setting up multiple email accounts.