For example, I definitely see the decrease in frequency, or not at all, on Reddit philosophy getting into frontpage despite having millions of subscribers. Many posts from r/philosophy often would gain thousands of up votes landing them into the front page. However, since Reddit's crack down on bot activities, I see r/philosophy posts getting only a fraction of the number of up votes they used to get, which makes almost none of the posts go into the front page. It is clear evidence that bots manipulate the votes.

I don't know about you, but others also noticed completely innocuous and benign comments just getting a downvote. Before I would chalk it up to people just down voting for no reason or to downvote others to propel their own content at the expense of others; but after what transpired with Reddit's crackdown on bot activities and user participation just so happened to decreased significantly? One would have to admit or acknowledge there is deliberate manipulation on what contents get to be seen or promoted long before and even as we speak.