> Only four companies—Amazon, Apple, Facebook and Google—currently meet the parameters laid out in the bills, according to one of the people, and they are the same companies that Congress investigated as part of its probe into Big Tech. Walmart Inc., WMT +0.44% for instance, operates an online marketplace and has private-label products, but only has a $392 billion market valuation, so wouldn’t be subject to any of the bills, according to a person familiar with the matter.That seems oddly specific and I don't follow why this has to be the case