>In Japan, the country where the first emoji sets originated, red is traditionally used to represent increases in the value of a stock.
I don't see it necessary to make a correlation to a stop-light's color coding. You could also argue why anything hot is colored red while cool is supposedly blue.
How is this different from Google Express? Google Express has somewhat recently eliminated the need for a subscription and deliver products from many local stores including Costco and Walmart, although admittedly the Walmart selection isn't quite everything I would hope for.