So I was just exploring pages on Instagram under my niche which is music edits etc, I found this guy who had few accounts(written in his bio) . And all of them had like mad growth going from scratch 0 followers to 15k-50k followers in one month , I checked his page was hitting 21 engagement . Here are screenshots of his 15k page
Is he buying followers ??
Here is my account which have 50+ engagement and its growing around 100 each day 
Same niche we both reposting .