You used Instagress for a month time? Or the accounts have ran exactly 30 days long? 3K in 1 month seems like pretty good progress. That's about 100 followers a day and 4 followers per hour. Once your account gets bigger, you will average bigger returns. The thing I have noticed about Instagress is that it really spreads out how many people you follow per hour even when set on the fastest speed. Once my 90 days I paid for are done, I am going to purchase Follow Liker because I think I have a pretty good idea where my accounts limits are and can really speed up the process a bit with some customized advanced settings.