You may have a point - but, this is not how this is set up.
maybe this is how it works:
The document is sold for ...let's say...$100k.Maybe Rush says...I donated a document worth $100k, so I get a $100k deduction.
The buyer also has donated $100k to a tax-deductable charity so he gets $100k deduction...(this is done all the time at "Charity auctions")... I don't think it matters if the "artwork" or the document has an intrinsic value....
Here's a link to the entity that is auctioning off the document: