Re: Is Debian a common carrier? Was: package rejection
That's the key. And we had a posting from Joe Alewin that was most
informative on this topic.
Akamai is fully able to turn customers away, and has done so for various reasons (e.g. the customer is a spammer).
For an example of a non-discriminatory mirror, consider the many ISPs which provide general HTTP caching services through Squid. Whether as a transparent or voluntary proxy, the goal of these caches is to improve content availability and transfer speed, while reducing bandwidth costs.
That's the best example we have, I think.