Because people reuse the same password so often, leaked crendentials for one site often means hackers have access to other sites as well.
Amazon has reset some customers’ passwords and asked them to change them, according to reports.
Amazon says that during “routine monitoring,” it stumbled on a set of email and password sets posted online.
Amazon isn’t the only online service to check for reused user credentials: both Facebook and Netflix prowl the internet looking for your username/password combos to show up in troves of leaked credentials.