"The LDS Church does not demand tithing payments. They strongly encourage tithing payments. There are many members of the church who are not active, do not pay tithing and are not in fear of losing the church membership. And no member of the church is ever threatened with excommunication for failing to pay tithing."
This may be true, but he left out one major item for not paying their tithing. Those not paying their tithing cannot get a temple recommend, or the golden ticket, so to speak, that allows them into their temple.
So in my eyes, that is sort of a demand that you pay your tithing or be a Mormon who will not reach the main goal of the Celestial Kingdom.