Slice Intelligence, which gathers e-commerce data from receipts noted that Amazon dominated online Black Friday sales, accounting for 35.7% in e-commerce spending on November 27. A distant second, Best Buy was at 8.23%, followed by Macy’s at 3.38%, Walmart at 3.35%  and Nordstrom at 3.11%. Slice also estimated thatonline Black Friday sales rose 7 percent, and that the preceding days saw a 14 percent uptick, due to sales starting early.