Wouldn’t that type of job make you really cynical about every other comment you read online? If your posts are hidden ads then what about the others?
There is a difference between an advertisement that is labeled as one and a disingenuous post on a site like this one where that type of activity is nonexistent.
While you might derive some short-term pleasure from the challenge of infiltrating people’s trust boundaries, it can’t be something to be proud of.