Hi, I’ve posted a more detailed version here on my support FAQ: What’s happening to Instagram? Their API is changing!
But basically nothing new. I don’t wish to start an approval process on my still-working apps as they would stop working if they fail the request, I think. Option #1 would be feasible IF you can get your own app reviewed somehow - not saying one should lie to Instagram but perhaps there is a loophole.
Sandbox is ridiculous, it’s like the content you can pull is only from you or the 5 users you add and the last 20 entries, like there were no other content on the entire Instagram. I suggest we move on to other social sites that support hashtags, selfies, location tagging - Facebook?