Even if ethical ad networks exist, they most likely wouldn't want entangle themselves with a file dump like ZippyShare.

Plenty, usually in the form of individual websites selling ad space on their website, just like newspapers sell ads in their paper issues. No user tracking necessary, and if you sell based on time you don't even have to track impressions or clicks.

But that doesn't fit the "apply to our whitelist" model of many "ethical" ad-blockers.

There's https://www.ethicalads.io/ if you're only targeting developers