Could the article be referring to subaddressing? e.g. yourname+amazon@gmail.com yourname+etsy@gmail.com yourname+itunes@gmail.com I still don't really t

Could the article be referring to subaddressing? e.g. yourname+amazon@gmail.com yourname+etsy@gmail.com yourname+itunes@gmail.com I still don't really think this counts as fake emails, since it has legitimate use cases, but I suppose if their backend couldn't tell the difference and a single person used sub-addressing to sign up multiple times that you could argue that these are fake-ish.