Could be that they give you some visibility and then drop it, cause I got lot of traction at begin and then it faded away, same posts anyways... I also notice the algo tends so pair opposite opinionated persons, on palestine posts it's full of pro Israel comments and the opposite, leftist posts are showed to right wing people, I see this on comments, could pair with your idea, if you are shown opposite ideas than yours you are likely to comment rather than just drop the like