Isn't that their ideology and fundamental bases of this printing establishment?
It gets them free labor as the gulible join the winning side(watchtower corporation) and do their part in selling their printed material, and engaging in membership drives to supply more free labor workers.
No matter how many dates they set that never came to fruition they proudly beat their chest and say:"at least we were keeping on the watch and warning people" like that is some type of badge of honor, and yet they disfellowship anyone who in their ranks complains about such false dates and suggest they might be false prophets. Not a very good Ideology to run a corporation on especially as the wrong dates and years keep mounting up, and the record is availible on the internet for anyone to see.