So, taking the thread back a closer to the original topic:
My wife and I decided yesterday that we should look into cloud backup for her ~250GB photo library since an earthquake or fire would take out not only her primary storage but the backup too, since they're both in the house. We didn't get into exhaustive research because a cursory look was all it took for us to decide that, at least until we see what larger plans from Apple cost when they announce them, Google Drive is a no-brainer. $10/month for a TB? That's roughly the same price as 200GB from Amazon and a measly 50GB from Apple (again, at current rates).
I get the privacy concerns, but honestly, what are they gonna glean from a big stack of photos? The pics have squat for metadata -- no geo, no tags -- so unless they're going to do some heavy face recognition I don't think we're revealing anything that could adversely affect us. At least not any more so than with any other third-party storage solution.
Unless Apple really sharpens their pencil in a serious way, and history doesn't suggest we should be particularly optimistic, I can't see any reason for us not to go with Google for this.