Seems like Steam could pretty much fix that problem if they changed the fee to $200, and doled out $@-$5 credits to random people that reviewed similarly tagged

Seems like Steam could pretty much fix that problem if they changed the fee to $200, and doled out $@-$5 credits to random people that reviewed similarly tagged games along with a copy of the game that's good for 5-10 hours before needing to be purchased (or until a certain date), as long as they give a thorough review of what they were able to see. Steam already tracks time played in the game, so it's not like they would have to add a bunch of mechanics to track extra stuff, and this would allow for some fairly good initial reviews to be seeded.