The three-question rule at the end is the part worth keeping. I use a throwaway address happily for a one-off download or a trial I'll never return to — that's exactly what it's for. But the password-recovery point is the trap: the account feels fine on day one, and six months later the reset link goes to an inbox that no longer exists. For a small business, that also means never letting a tool or vendor account sit on an address nobody owns anymore. If I'll need to log in again, or get paid, or prove who I am, it goes on a real address I control.