The 1st thing list behind these blocks etc. was proxies. Instagram take a serious thing about proxies. Yes there are a bunch of other reason like bot settings, account reputation, engagement of the accounts etc. but the real reason is 90% because of proxies. I had accounts with extra settings up to 120 combined actions per hour and up to 1800 action per day with no any problems. But you got bad proxies even you use it for 100 action per day it wont help. The problems is we dont know the quality of the proxies out there, i invested so much for proxies and spend hundreds dollars only of researching, and the expensive one even didn't assure your accounts will works smoothly. Share or dedicated, virgin or residential? Honestly we didn't know anything about the quality untill we'd tried, right?