The RiteAid in Westwood, CA didn't allow me to load more than $100 at a time. I've never hear of such an arbitrary rule before. I pushed back and the rude clerk asked to see my ID -- as if I were buying a restricted product.
I thought she was just incompetent, so I came back another time -- and had the same issue, and a manager came and confirmed. He gave me some mini-lecture about how each store can set their own policies.
Don't bother with this store if you're ever in the area.