The adjustments will be a harsh blow to electronic media businesses, lots of which spent the last few years constructing out trade divisions dedicated to recommending items that are largely purchased, at least in the US, on Amazon. Other dealers, like Best Buy and Walmart, also run online marketing courses, but Amazon is still the leader in US e trade with nearly half of all online sales. Last month, Amazon and other agents also began postponing dedicated trade advertising and marketing deals, which are break away the usual affiliate program, with big digital media firms amid the COVID 19 pandemic.