We called 1-800 Got Junk a few years ago to clean out my brother-in-law's house so he could move to a new house.
We were told that they sorted the items, donated the good to charity and very little would end up in the landfill. They came they took the stuff that they thought they could sell and put it in a storage locker. Threw the rest of the stuff in the back of an open truck (new sleeper sofa, useable furniture, cloths, pictures and list goes on. My brother in law was upset since it was raining, they said they were taking it to the dump. We would have been better off setting everything outside of his house with a free sign on it.