I upload all my files via Stocksubmitter. If illustration does not require a release, it gets through into Canstockphoto; if it requires a release, I just ask Stocksubmitter to ignore the file. So, only half of my files are getting uploaded. But with the amount of sales on Canstock it is not worth messing around with every illustration that needs a release. It would be a better idea to spend the saved time producing more quality illustrations and uploading them to more profitable agencies.