Big accs organic drop 50% in the past 3 days

Instagram is getting extremely crazy in the past 3 days!!! size 300K – 600K men fashion high engaged accs organic followers drop to half. (something like 1000 followers/day dropping to 500/day). also, big acct over 3 millions have negative followers such as @menwithclass https://socialblade.com/instagram/user/menwithclass

It is getting so hard!