I think one of the problems is that IG is doing nothing about Bot and Fake accounts. 95% of all followers requests are bot/Fake accounts. (eg, 0 posts/11 followers/7437 following) : r/Instagram
9 Best Instagram Bots for More Follows, Likes & Replies
Cómo Automatizar un Bot para Instagram | by Eduardo Morales | Medium
Los bots de Instagram: qué son, para qué se usan y consecuencias | Social Maggie