Like they're signing up for something and put in "santosh83@gmail.com" and think "My name is Santosh and I was born in '83. Google obviously knows this and will send me this email!" ????????
This GP from New Zealand signs up for EVERYTHING under my gmail account. A handful of it spam, but mostly important stuff - notifications for financial transactions make up most of the mails I receive.
I have called his offices repeatedly to try to discuss it with him, and even have a reasonable rapport with his secretary, but he never wants to take my calls.
I really cannot figure out why he does it.
Had first.last@comcast.net, but migrated to gmail and had to use something else. Then they misremember and hand out first.last@gmail.com.