Jack Attack, We are reading the same thing just quoting different parts...
What you are quoting is what the license will allow you to do
IF you choose to accept the terms of the agreement.
What I am quoting are the instructions for how to accept the the terms of the agreement and what you are expected to do when you release your game.
See the difference?
The document you are reading gives you no commercial usage rights
unless you accept the terms and conditions and indicate acceptance of such by sending the required email.
This process of sending an email as the equivalent of saying "yes" is really poorly thought IMO as it takes something users are accustomed to doing by simply clicking an "I agree" button when installing something and makes it a lot more complicated.
Quote: "It's a silly system, it should say that "by downloading this item, you agree to following commercial license"."
I think users should have the right to remain anon. if they only want personal use. Remember, it's the author being notified and not TGC. I think a better solution would be to have a button that shows on the item after purchase (same as the rating option) which allows the user to say they accept the commercial license terms and then the store system automatically sends the author the notification email/info for their record keeping. I personally don't need/want the emails and names of everyone who buys my stuff and I realize there is no inherent privacy policy to make the user feel safe about sending their info. There's also no way to determine from random emails if someone really paid money for the item or just looted it and has the balls to register it. Likewise, if someone emails me about an item I have no clue if they have a legit copy or not.