I am not part of the other sites, so I am not as aware of what they do as you are.
I guess my main concerns for this idea are...
1. Will the scripters who have been approved really help out since they are not getting paid like @Alek is?
2. Will the scrtipters be fair and not disapprove of this because of competition?
3. Will the scripters that have their scripts up for approval be willing to let the other scripters see their code?
If I misunderstood your idea, my bad.