&gt;<i>What is the logic for reciprocity</i><p>I don&#x27;t pretend to know, but I can think of a few possible reasons:<p>^ Do unto others what you would have them do unto you.<p>^ Educate foreigners about the realities of how their country treats other people (obviously many don&#x27;t know, even the author of the article is seemingly clueless).<p>^ Change the policies of their home country (as you suggest).<p>^ Realize that for an American, $100 is not a lot of money, so it&#x27;s a good source of revenue in itself.<p>^ Realize that Bolivia is absolutely, jaw-droppingly stunning, and any American traveling in South America won&#x27;t let the little $100 fee stop them, because it&#x27;s clearly worth it.