Amazon Prime Video is the latest streaming service to embrace ads in what it says is an effort to continue investing in content. Ad-free service will cost an extra $3 per month.

An Amazon promotion that tipped delivery drivers $5 for every customer that sent a "thank you" message maxed out on the second day, raising questions about whether drivers deserve tips year-round.

Amazon is increasing the U.S. subscription cost to $139 a year from $119, citing more customer benefits and higher employee wages and transportation costs.