TB, it not about WEIGHT but about expansion (so maybe 1 cup should have been defined as 1 pound, which is what we did). It is a lot harder to get a heifer to eat 5 pounds of beet pulp (large space taken up) versus 5 pounds of depth charge (hardly a scoop). The purpose of feeding it is to give a deep, big full look. Beet pulp does not expand like the depth charge, or Rumafill. The point of the product is to get as much in them as you can dry, and then allow them to drink drink drink to allow the product to expand about an hour before your class. Lots of cattle will not eat as much beet pulp as they will the other fill products out there. I have fed both, and feed both, in different situations. When you are talking about show cattle, you are a completely different beast (not what is cheap, but what works best for your money). Look in any show barn that has numerous wins under their belt, and there is going to be a fill product BESIDES beet pulp there. There is a reason people are using it, because it works.
I would hope our numerous State Fair wins gives me a bit of credibility when it comes to feeding cattle, at least show cattle. The poster simple asked who used it and how... I was simply giving our experience.