Just did a small test with 2 brand new IDENTICAL accounts testing following users who "interacted with acct" vs "Users who follow account" I notice that a lot of people tend to gravitate towards "users who interact" because you can target current active users. I too do this, but have never actually tested because you normally don't make IDENTICAL accounts so you cannot actually account for all the variables that make users follow you. Here are the 2 test accounts, Name is almost identical, Logo and Bio are the same, photos are being pulled from the same account (different order). We can test this without any crazy variables being involved. Here are the source settings. Account on the left is following friends of target accounts, the right is following users who interacted in the last 120 mins. Same exact sources. Here are my follow settings. Yes, I followed 500-700 people on the first fucking day. Crazy? Maybe. Conclusion: Following friends of target accounts got me 4x as many followers on the very first day this account was active after 600 follows. The Follow back ratio is shit, but that is to be expected with an account with ZERO Authority. I will continue to test, as should you, but this is just a very small case study regarding this.