Clerks would have made zero money without copyright.
Just like the Nine Inch Nails album that was released as a free download but still made ~$1,000,000 in CD sales?
Seems pretty clear. The free download was not where they made their money - it was in the CD sales. If someone else were able to make NIN Cds, they would have got nothing.
And as we discussed earlier, individual artists and programmers really can't stop themselves producing. They love it. But that is entirely different from large projects that require budgets like computer games and movies. We've covered this - I don't know why you want to repeat it ? Your position is that even if movies become much scarcer, the trade-off isn't worth it. Or are you saying that making movies scarcer would be an unacceptable price and then you'd be willing to countenance intellectual property ?