I applaud your attempt to read several pieces by all who follow you. That's commendable, and I make an effort to do that as often as I can.

But follow 100 people a month? Why, for growth? That will work, to a degree, but I'm not sure how you will identify those writers whose work you really want to read. Another strategy for gaining followers is to comment intelligently and publish great work, however "great" is defined in your genre(s). They'll find you.