I only ever stream, don't like downloading, waste of GB for something I am more than likely only going to watch once. And I only ever stream stuff that I wouldn't pay to see anyway, last one I can think of was Role Models, no way in hell I was paying to see that, but ill stream it since its free, there not losing any money from it, and if i liked it enough I might have bought it on dvd. I didn't and I won't but the point stands. I started watching Watchmen online, but I wasn't feeling it, so I went to the cinema to see it instead.
I apply the same logic to downloading cds, if I hear a band is good and I want to check them out, am I going to blindly buy one of their cds? No, given my taste in music they probably wouldn't have it in stock anyway. But if I hear they are good will I download their cd, hell yes I will. Has happened to me with a good lot of bands, I remember downloading a few songs by Amon Amarth, and really liked it, I have since bought all their cds legally, seen them live and even bought a tshirt of thiers, all because I was able to download thier songs online. Who says piracy doesn't help sales, I am proof of that sure.
We live in an age where the most pirated movie of all time(The Dark Knight) can make over 1 Billion at the box office, who says piracy hurts the industry.