The last time I checked, when Megaupload was still online and Megakey was being tested, it worked by replacing existing Internet-ads with ones served through the Mega-network when a person surfed the web. Essentially, it's a voluntarily installed ad-ware.
Ah, so it's a Gator[1] clone. Great, something else to warn people about. Gator was allegedly installed "voluntarily", but it turned out that wasn't how it usually happened...
The legal snafu with MegaKey is that it REPLACES ads, which, depending on situation, could easily be illegal contract interference. If it steps on banner ads and contracted ad real-estate on websites (Facebook, for example) he's stealing revenue. I'd assume if he were confronted with this, he'd play the "champion of the people" card, stating the original ads were placed there by greedy, unethical corporations and thus he's a hero. (Last part is my opinion, first part is an actual legal problem ;)
Thanks this if the first I've heard of it. I could see that being an interesting proposition for many people (the ones who refuse to pay for any music). As someone who still buys music and subscribes to Spotify Premium there's no way I would use it.
The last time I checked, when Megaupload was still online and Megakey was being tested, it worked by replacing existing Internet-ads with ones served through the Mega-network when a person surfed the web. Essentially, it's a voluntarily installed ad-ware.