The car's arrival drives the NEED for the DaN.
Scenerio:
You're a Chevy store and the owner has landed a 2006 Volvo XC90 Cross Country SUV. You've never seen on before, but It's your job to get it up. You shoot the photos, record the options, X your fingers and off to DaN you go.
Once you log in, you drill into the selection, arrive at 2006 Volvo XC90 Cross Country SUV, then read the 16 comments left by your peers...
As your platform matures, it is easily possible to have a dozen comments on a single vehicle. Hence the need for a ranking system.
- It improves the user experience
- It creates a reward system for your contributors
Just my $0.02