Yeah but like why would you want less followers?
Rather have 10/11 fake followers than 9/10
What? The fake followers slowly become replaced by the real followers. The entire idea of fake followers is the natural "bandwagon" bias. People see that other people like something, so they like it too. The only problem with that in social media is that fake followers don't typically comment and like and photos and posts, which is why the system takes away a fake follower every time a real person follows the page.
The amount of followers essentially remains the same until the entire fake follow-base is replaced, and as they're replaced, the amount of likes per post goes up.
10/10 are fake. 1 real person follows, now 9/10 are fake. Another real person follows, now 8/10 are fake. 8 more real people follow, now 0/10 are fake. 5 more real people follow, now 0/15 are fake.