I think it's the difference between the DVC and regular resort procedures. DVC is still doing the daily security check with trash removal, so Poly probably doesn't send anyone overnight collecting trash from the hallways in the longhouses (because ppl shouldn't put trash there b/c it's collected from inside the rooms each day.) (I have stayed in Riviera, Saratoga, and Poly during COVID and they all have continued the daily trash removal/security checks.) On the other hand, the non-DVC resorts are doing it differently, hence the more regular hallway trash pickups.