It's a good idea, and I think there is an argument for making advanced autotrading features more expensive (require more holdings rather), if nothing else so that that effectiveness is not diluted, but 10,000 might be a bit much, especially if it gets popular.

 
You and me both! Keeps incentive strong for rapid development

I imagine eventually there will be an open source trading platform offering advanced features and supporting multiple exchanges, but I also imagine it could be a while before we see anything like that. I hope QTL trader can fill in the gap nicely until (if/when) that comes along.