Since you agree with me that there exist "disgusting and slimy ads out there", and I agree with you that there's some that merely facilitate information, perhaps the more interesting question is "what's the ratio?"

I firmly believe that the vast majority of ads out there are unarguably manipulative: feigning time-sensitivity to pressure people into purchasing, availing themselves of psychological tricks with color and attraction to retain eyeballs, purchasing praise and endorsements and passing it off as sincerity, etc.