The Instagram algorithm is one of the most studied algorithms on the internet. Of course, the company itself would never come out and reveal the inner workings of the systems that power their platform.
Because they know that while this might seem beneficial to an extent for the users, it will also lead to numerous people taking advantage of critical weaknesses in the algorithm and using it towards their malicious ends.
For this reason, the inner workings of the Instagram platform remain a secret. This, however, hasn’t stopped avid users of the platform from figuring out significant vital aspects of the Instagram system.