Can we still get statistics from all gateways and nodes?

Using ttnctl the other parties can share access to their applications using:

$ ttnctl applications authorize --help
ttnctl applications authorize lets you authorize a user for an application.

Usage:
  ttnctl applications authorize [eui] [e-mail] [flags]

This way you are still able to get data send by devices registered to that application.

Being able to see a node is transmitting data and with what interval is a security/privacy concern in itself. If a node is used to signal movement of an object or a button press the presence of a packet on the network provides information as well. So I'm glad we have the option to share if we want and keep private if we don't.