I use it under the roosts (non-clumping kind) to dry the droppings, but it is completely enclosed by fencing so they can't get into it.
One of the stall products I looked at contained the same ingredient, just ground finely.
Are you having some type of problem in your coop that you are trying to solve? Or is it just that you think you are supposed to use something else in the litter? Although some people choose to add things to their litter, none of those products are necessary in a coop, although DE can be useful if you are treating an active case of external parasites.
Other than that, problems with litter in a coop are usually due to not using enough litter, using a litter that's not absorbent enough, or needing to clean out or add more litter, depending on whether or not you are using the deep litter method.
It would help to know what problem you're trying to resolve.
I tried Dry Stall for the first time a couple weeks ago and it is wonderful. Keeps the bedding dry and really cuts down on the aroma! and I only used 3-4 cups! I got mine at TSC, a 24# bag was about $9.