Each driver has a characteristic spatial and temporal scale at which it affects ecosystem services and human well-being. Climate change may operate on a spatial scale of a large region; political change may operate at the scale of a nation or a municipal district.
Amazon has several competitors in the electronics and general merchandise segment, many of which are brick and mortar rivals including Best Buy, Family Dollar, RadioShack, Staples, Target, Walmart, Sears, Big Lots, Delia and Systemacs.
Almost certainly, the seller is using some kind of software -- made by DS Domination or a competitor -- that scans Amazon for its best-selling products. (They can also do this on large sites like Walmartâs, though most seem to focus on Amazon).