I’m sure it is a “trade secret” algorithm developed, and I’m sure modified from time to time, by Dronestagram. You are, however, not the first person to wonder about this. A while back, M.Bernholdt and I were joking about the fact that some hacker had stolen a bunch of his pictures to post on the hacker’s website — and apparently hadn’t thought mine were worth taking. So, we were wondering if somewhere in the algorithm there was a line for “pictures thought worthy by hackers of stealing?” [[+1 to pilot ranking if Yes, -1 to pilot ranking if No]]. I’m obviously kidding, just in case there are any hackers reading this.