There's a real opportunity of profit for any user without any initial investment, but those joining the Crowdsale before the public release will have the chance of being a Pioneer Miner, i.e. host, of certain media content permanently. Therefore, generating consistent revenue every time the user is online.
Obviously some content is more valuable that others. Likely, if you are successful, your most valuable content will come on board long after many other lesser artists have. So, do you have some algorithm for who gets what content, and when? Will the crowdsale participants always have first choice re: what content to host?
Finally, I'll torrent something from time to time, but I don't host things. So there would be a necessity of keeping my PC or server on, in order to monetize my cached content?
Yes, Crowdsale participants will have the first choice of which content to host. That's a huge benefit that can provide way more profit than anything in the blockchain technology.
Other users are chosen to host content in a random way, giving priority to the content already streamed by you.
And unfortunately yes, you've to keep your hosting device online for serving content.