Freebies caused Blu-ray spike in Jan

The collapse in HD DVD sales in mid-January is now partly being blamed on a series of Blu-ray promotions

Data firm NPD has issued a warning over leaked sales data that showed Blu-ray surging ahead of HD DVD in early January.

The data appeared to show a complete collapse in sales for standalone HD DVD players, and an increase in sales for Blu-ray despite both formats being neck and neck the week before. Many blamed the collapse on Warner Bros' announcement on Friday 4 January that it was dropping support for HD DVD.