Fifty US retailers sent nearly 42 billion emails during the Black Friday hype — and they were loaded with sneaky ways to track your habits

Business illustration of a businessman buried in junk letters and spam messages.

• Retailers are using more aggressive means of marketing
• Late night marketing and emails loaded with trackers are now the norm
• Tracking pixels and links monitor online activity without user knowledge

During the Black Friday and Cyber Monday weekend, the top 50 retailers in the US sent close to 42 billion marketing emails to customers.