I like the idea, but the goal would be to make configuration, deployment, maintenance, and good security as easy as possible. So easy that you don't have to touch a command line. Mind expanding on the idea a bit?
The original uploaders of very popular content would accumulate a surplus of credits, which they then sell to to mega-crawlers. Content creators would do well to be the original uploaders of their own content on such a network.
The credits would also be incentive to buy devices and leave them running in poor-coverage areas. E.g. the owners of billboards could mount repeaters along rural highways.