My brother somehow got a Gmail invite early on and then we ended up with effectively infinite invites by inviting ourselves whenever we needed more of them. The

My brother somehow got a Gmail invite early on and then we ended up with effectively infinite invites by inviting ourselves whenever we needed more of them. They were useful for contests on his small forum because everybody wanted effectively infinite email storage. I don't even remember most of the usernames anymore but I probably had a dozen or so Gmail accounts back in the 00s.