There are few things more annoying than comments that are clearly cut and paste and have nothing to do with the material. Doubly so when those comments aren't even accompanied by an upvote and yet proclaim things like "Amazing! I love your work!"
Even a broad strokes scanning of the post - or even just commenting in relation to the title! - is a thousand times better. Anything but the totally useless non-comment.
I recently had someone copy a comment from the same post and post it, was like: lol.
Hah - that's a classy move. Hard to pin down what that person thought would happen...