How much does it cost Sony to keep PSN free?

[Dgc1808]

iBlah said:
Sony charges the publishers, I think its $0.1 per gig downloaded?? I'm more concerned about what happens when PSN userbase grows so big that publishers can no longer afford to publish on PSN, especially free stuff like demos.

It's 0.16$ per gig. This doesn't apply to PSPminis.