I use Instagress all the time too, and haven't been banned yet. So I don't know what your definition of "TON" is.
Instagress is definitely worth the money for me. I just wish things could be even faster when it comes to following/unfollowing. I wish they add the feature where I give them x number of people to follow an hour and they go off of this number instead of their fast, normal, and slow settings.