This solutions stamps the ebook with a visual information about the book buyer; the buyer's name and also hides the order information within the ebook file itself. (bookpublishingsoftware.com)
It should be noted that liquidity providing hidden orders are typically not rebated but are at least discounted. (money.stackexchange.com)
The sweet spot is that area where tantalizing contradictions are visible, but the stimulus gives us an inkling of a hidden order that can be figured out,» Davies writes. (discovermagazine.com)