Their program won't let you copy-paste reviews, so you have to actually write decent, original stuff to earn more than a nickel per song. Picking up on the key words you should be reviewing is important, and I've found through trial and error that reviewing each instrument, even very briefly, is a bonus, as well as talking about the singer's tone and quality, the overall recording quality, the structure of the song, how the composition of the track is set up, commercial potential, etc. Basically, just talk about a bunch of music-related stuff, and try to be as thorough as possible. If you don't mention enough "musical" stuff, the program won't accept your review as a musical review. It also won't let you write something too short, or something that sounds like your previous reviews (that part can be frustrating when it feeds you song after song that sound the same sometimes). Also, no major curse words. Just censor them.

If it tells you you didn't include enough musical terms, you can just tack some short stuff on the end, like: "Drums = good, guitars = dynamic, singer's voice sounded expressive, etc."
The fun part: you get to listen to a lot of generally really good indie tracks, and get paid to give them your opinion.
Give your two cents, and get two cents! 
The not-so-fun part: ~15¢ per thought-out, well written review isn't a lot of money. If your review is short, it'll be even less. And you do indeed have to sit through at least 90 seconds of each song. There are occasions when the site glitches, and your review won't be submitted due to an error, and the only way to fix it is to refresh the page. There aren't a lot of reviews you'll lose, but even the few you do feels frustrating because you're typing a lot for your pennies. Also,
their minimum withdraw amount is $10, so you're going to be there for a few hours. It goes by quickly enough, though.

If you get a rhythm going and learn what kind of terms to use to get a few nickels per review, you can earn enough money not to starve to death. And have fun listening to a variety of indie music. And tearing some of it to shreds if it's really terrible.

A few hours for $10 a day can add up to something you can actually use eventually. So I thought I would share.
