The one thing this post is missing - how does an advertiser book a campaign. How do they buy "ad credits" and who / how are the campaigns approved?

By a panel?

Can any ad be injected for anything?

Its a great proposal - but advertisers need to

a) know what they're getting for their 10c / view
b) be able to self-serve and launch campaigns
c) be able to easily buy the DEC to fund the campaign
d) be able to track their results

People smarter than me probably have thoughts on this too :D