Well, IMHO, regarding this current pest of worthless bots. I think you could have a close idea and figure out whom are the main actors behind this contagious and pernicious trend just by clicking on the quote next.

Self Upvoting - People are borrowing SP via delegation to self upvote the shit out of their own comments. I would be shocked if this isn't the number 1 reason to borrow.

And if you want to go deeper into this subject by drawing a big smile on your face while reading something of value. Then, click over the image below also- :)