Yeah, I did the entire thing (2. fricking. hours. It did say it recommended using multiple sittings to complete it, but I thought it was only 75 minutes, so I did it in 1. Plus, you never know if they would fill up...). I think the reason I qualified was because of what genre of music I listen to. I said I listened to two rock stations and every song they sampled was rock music.
I had $45 in my account before, so I am hoping to get over the $50 threshhold within a couple days so I can cash out for the GS GC.
I was surprised, since I had only gotten 3 surveys in the past 10 days or so, and DQ'd on two of them. Hooray for 50 cents a week!
Aside from that, I just want to say that e-rewards has its moments. You'll go weeks where you only get a couple bucks, and then you'll get a whopper like I just got.