The Resonance Medal is great for seeing who's still semi-active

This year's anniversary medal is the first to have an AP requirement, meaning that any player who earned it has either a) logged in and actively played in the last 12 months or b) had a previously submitted portal/photo/edit approved in the last 12 months. Lately, I've been seeing a lot of agents who supposedly haven't been active in years but managed to get the Year 8 medal.

I see you out there, Ingress lurkers.