The pam module requires you to forward a remote connection to your ssh agent - when you connect to a compromised server your attacker can authenticate to other machines as you.
That's pretty misleading - I believe Google's parent company still own part of Niantic. So other customers shouldn't expect the (implied) same access to Google resources.
>When several clients are attached to the same session, each client can watch a different window. When clients are watching different windows, every client uses the full terminal size.
Broadly the people who contribute, contribute because they want the data to be useful. The people who don't care about the data being useful aren't contributing.