Watch your insights. If your "Profile Visits" spike but your "Follows" stay at zero (aside from the bots), Instagram has flagged you. Remove the bot followers manually if you notice this.
While a small boost in numbers might seem harmless, several critical drawbacks exist: free 50 followers instagram trial repack
Do not use this free trial on your main business account or a personal account you care about. Create a "burner" test account first. Run the trial there for 48 hours to see if the account gets flagged. Watch your insights