I have seen a lot of these posts also lately.
One, they're mostly just interested in making money, and another, they don't care much about the content of the posts that their bot upvotes.
And I have to agree with your statement here. When I scroll through and read posts I like substance, unique things and clear explanations. I don't willy-nilly my UPvotes or comments.
That's why I'm honored to be read and followed by people like yourself!