The problem is that so many photo providers have started up and shut down (or been shutdown after acquisition) that it requires a huge deal of trust to switch to another provider.

I can see from your site you've been around for a long time, but that still doesn't help ward of fears about future acquisition.

And even if you could convince me, then you'd also need to convince all my family to pay for something that they currently get for free.

The lock-is effect for Apple products is strong.

That said, after looking at your site, I'll definitely keep you guys tucked away in the back of my mind if I ever decide to move of iOS.

from your page: >No facial recognition. No public search. >We do not index faces nor do we allow external search engines >to index your photos.

might move that up to #2 point. add in no creepy facebook like face features storing (worded better) to drive home the point