Hi,
I registrated at CodeGrape because it offers the same funcionality and pay rates as CodeCanyon, but on CodeCaynon waiting queue takes to much time.
And that is the main reason I turned for the best alternative, CodeGrape!
I think that your main advantage (and to get more users y not) can be a waiting queue. The waiting time should be NO MORE THAN 24H.
That's it from me, cheers!