Oh, thank you. I've looked and I'm opted out of
"Regardless of my privacy settings below, allow all of my profile information to be shared with our Authorized Developer Project-GC for my own personal use and the use of others."
But the only data I've opted out of sharing as "Private" is "Profile location" and "Trackables", with all the other types of data opted to "Public". So while that might effect some channels for data gathering it probably shouldn't cut off Project GC? Or maybe it does?
ETA: I can share my location as I set my home to the top of a big hill (not where I live).