Do you believe the Watchtower organization is inserting them, or individuals are doing so on their own?
Having looked at the images that people have found and pointed out, I have to say that I don't think they are there at all. Just random patterns that happen to look like something familiar.
BUT, if they *are* there, and they *are* intentional, then what possible motive could the Watchtower organization have for inserting them? If they didn't get noticed, it wouldn't do anything to further their agenda of increasing their membership and their net worth. If they DID get noticed, it could only serve to damage them. So I can't see any reason to believe the organization wants them there.
I could buy that an individual artist (or group of them) inserts them for their own amusement. I don't buy it, but I could if I was shown an image that I could believe was an intentional insertion.
What do you think? If you believe they are there at all, do you think the Watchtower is behind them, or just individuals? And for what reason do you think they are there?