This was pointed out to me me by one of my caching friends today. Here is an excerpt from the Garmin blog. Notice that is mentions geocaching.com directly. Where is the mention of Opencaching?
The GPSMAP 64 series makes paperless geocaching easier than ever. Each device comes preloaded with the locations of 250,000 geocaches from Geocaching.com. Devices store and display key information to find the cleverly hidden containers including the geocache coordinates, terrain rating, its difficulty, hints and descriptions, so users no longer have to manually enter coordinates or print out geocache info. By going paperless, users are helping the environment, and improving their efficiency. If users would like to continue geocaching beyond the preloaded geocaches, when they register their device they can sign up for the free premium membership trial through Geocaching.com, and download even more geocaches. In addition to the preloaded geocaches, the GPSMAP 64 devices can store millions more, so users will no longer have to pick and choose which geocaches they want to load on their device.
I will check with some sources to see what is going on here.