I'm not sure if this has ever been suggested, but how about free PA for newbies for a short period of time, say 10 days upon registering with an automatic expiration after the 10 days.
Mods could send a PM to the newbie extolling the benefits of either paying for PA or writing reviews to obtain it.
After a small taste of PA, I'll bet most newbies would either renew in a pay status or write a review sooner if they knew what they were missing.
This might eliminate a lot of newbie questions since they could see for themselves what they will be missing when their free PA expires.
Just a thought.
K.