How can they following millions?

I found some accounts and they are following million accounts.
This is one of them: fitness_elites
Is there any trick or it is normal?

 

Really, really aged accounts. Probably one of the first ones opened, can follow more than 7500.

 

WTF lol maybe they followed all these users before the Instagram 7500 limit.

 

@ig_fitsporation
I think they are not very very old accounts, if i have very very old account it would be like @Fitness , @workout
Or i am wrong

 

The first pic on this acc was uploaded on 1 November, 2013. However the engagement on this acc is shit.
The strange thing is, that the first photos on this acc get from 2k to 8k likes and more... and then suddenly the engagement drops to below 1000.
Look at the most recent photos, they can hardly get 600 likes lol.

 

Account would've done all those follows before the 7500 limit was introduced.

 

Yes, all of these accounts followed that many before the 7500 limit was put in place.

 

ya they are frist who registered with instagram thats why

 

Which site is this?

 

Socialblade

 

They probably had it as a personal account and followed many people, and then later on changed the name to something fitness related, so thats why they didnt have a very original username

 

Thanks op