I tried to include two links to Amazon in this answer, one to the amazon.com page of a book and one to the amazon.de page of the same book. (This made perfect sense, since the two pages contain different book reviews, all in English.) In the edit preview, the links worked. However, in the submitted answer, they both got replaced by this link (though the original links were still there when I edited the answer again). Apart from the fact that I strongly prefer to decide for myself what links I put in my answer and find it disturbing that they get changed behind my back (after all, people will attribute those links to me and not to the machine that replaced them), in this case it broke the content, since the two links that were supposed to point to different pages with different reviews now pointed to one and the same page. My questions about this are:
What is the rationale for rewriting the links?
Why do the rewritten links not lead to the pages originally linked to?
If there is a good answer to 1, is it compatible with that rationale to do what I did, namely to use a tinyurl instead of the Amazon URL to circumvent the rewriting?
Yes, StackExchange is an Amazon affiliate. If someone clicks on the link you provided and buys the book, StackExchange gets some money for referring them.
They have a "cunning plan": to facilitate actual ordering of books, the link geo-locates where the link-clicker is based (using the IP address) and links to the appropriate Amazon store for the locale. (So presumably someone in Germany would get the amazon.de address, while someone in the UK would get the amazon.co.uk address, when accessing the "same" link.) Cunning plan vetoed by Edmund. (See comments below.)
Well, since your link to the review is especially for the purpose of supporting your assertion of there being a misprint, rather than as an actual book recommendation, I guess it is reasonable.
%2E. Compare Direct link
www.amazon.com/...and Encoded link
www%2Eamazon.com/.... See also my deleted answer below. $\endgroup$