Did you look at the link? The detection methods used, and the discussion of mitigation in the thread, make it clear that if they are doing any mitigation at all they are neglecting obvious red flags.

Every business is obliged to be ethical, vigilant against deception, and not blatantly lie, no matter what size they are. Even if you could make an argument like this, reddit was already pretty big ten years ago. That's why they started running ads.