It is definitely quantity over quality although that isn’t a new thing. People use these places as an excuse to offload their junk particularly on a Monday if they are near a site that does boot sales as people just dump what they can’t sell. The Oxfam in Newport Pagnell the front door was often all but inaccessible by black sacks. Sorting donations is often not a pleasant task they often come across dirty underwear.
The more I know the less I understand.