"[$30,000 USD] in developments costs have gone down the drain". It seems kinda silly to put 30k$ in a project that's looking for trouble and where all your eggs are in somebody else's basket.

Also, I don't know the nature of Dropbox's app approval system, but my instinct is that it's somehow naive to assume that you're all good just because your app was not rejected. It's like speeding on the highway, not being stopped by the first cop you cross, then whining when another one arrests you further down the road: 'But the other officer cautioned my speeding!' lol sure.

When I read the initial post (yesterday?), my first thought was "How long before Dropbox blocks their access to their API".