U.S. retailers are estimated to generate online sales of up to $11.3 billion on Cyber Monday, a decline in growth from a year earlier as fewer discounts and limited choices due to global supply chain disruptions deter shoppers. Retailers had also spread out promotional deals across more weeks this year to protect profit margins from surging supply chain costs and to better manage inventories amid widespread product shortages ahead of the Christmas shopping season. Those attempts have pinched sales on what are traditionally some of the biggest shopping days of the year, with data from Adobe Analytics over the weekend showing spending online during Black Friday fell for the first time ever, reversing the growth of recent years. U.S. spending on Cyber Monday, which gained popularity in the mid-2000s as a way for online retailers to cash in on the jump in consumer spending around Thanksgiving, is expected to be …