I noticed a couple of people on Instagram gaining 1000-5000 followers per day - even after the new Instagram API restrictions were introduced. What's more, these followers are legit Instagram users who interact, comment and like. I know how they do it, but I can't even get close to those numbers. On a good day I manage to get about 250 new followers without mass follow/unfollowing. From what I can tell most bots are dead in the water as they rely on the Instagram API in one way or another. If anyone here can replicate the above mentioned results, let me know or chip in here if you like.