49 per cent of HD console owners have not purchased DLC content in the past 12 months, so says a new report from entertainment research outfit EEDAR.

According to its data, gathered from "a variety of sources", that compares to 60 per cent in 2010 and 66 per cent in 2009.

Its additional survey, which polled 3500 participants, suggests the following reasons that gamers choose not to buy game add-ons:

Privacy: 47 per cent

No return policy: 38 per cent

Too expensive: 32 per cent

Enough free DLC: 24 per cent

No demo: 24 per cent

No reviews: 21 per cent

None for interested games: 20 per cent

Not adequate description: 20 per cent

Not enough gameplay: 18 per cent

Only online multiplayer available: 18 per cent

Only single player available: 15 per cent

Process takes too long: 15 per cent

Complicated storefront: 15 per cent

Not released when wanted: 12 per cent

Not high enough quality: 11 per cent

EEDAR reckons that DLC will generate over $875 million in North America in 2011, a figure that should top $1 billion in 2012.