How many devices can I link to one account?

All Topps apps have a 'One Account per Device' policy. This was instituted in order to combat the increasing proliferation of accounts and fans gaining cards by nefarious means.

What does this mean?

1. For each device a FAN has, only 1 FAN may be logged into that device.
2. Attempting to log into a device with a SECOND fan name will not work.
3. You may not have more than one person using a single device to play.