I've been suspended quite a few times in the last 6 months. I find that if I follow say 500 throughout the day my account will get suspended, but if I follow 1,000 in one go every 24 hours, my accounts fine. Maybe as your account becomes more established they're less strict with it? But it seems to work for me.
I have heard of large accounts getting permanently suspended though, so it's not something I'd want to keep doing.