(Reuters) - Cyber Monday sales were on course to bring in a record $9.4 billion (£7.33 billion), according to early estimates, building on a bumper Black Friday weekend for retailers driven by earlier-than-usual promotions and free shipping.Shoppers have already had nearly a month of special offers and deals as retailers look to draw out their vital holiday season, which is six days shorter this year due to a late Thanksgiving.Estimates from Adobe Analytics on Monday predicted that some $72.1..