Whats the charging model difference now?
Without Premium, its now unusable.
Up until recently, you could pay a charge for app and see all non-premium caches. Now the app is free, but to use the app for all but easiest caches, you need premium. Granted, you could, if you're organised enough, print them off from the website at home, but most of my caching was always spontaneous.
Around the time this happened, I saw the drop off in activity on my caches, and notice hardly any new ones are popping up.
Obviously, Groundspeak need to make money to pay for the service, but I worry that they might have overcooked it.
I notice they changed mapping provider a while back, I wonder if the new default one is more expensive

Also, on iOS, the new (free) app is so hard to use compared to the, now defunct, old (paid) app.