Instagram is currently deleting millions of fake, inactive, and spam accounts daily.
If you have a large following, this is the reason why you are losing followers.
That does not mean you are not gaining new followers through our service, though.
If you gained 30 followers daily with us but lost 100 because of the purge, you’ll be at -70 for the day.
All of our larger clients are experiencing this and losing hundreds a day, so I would not be concerned.