I checked with the Chilean Embassy here in L.A. and it is $100 cash - and if we start charging more for Chilean citizens, they will start charging us more - quote, unquote. It is called a "reciprocity fee". Tit for tat.
I am leaving on thursday for my cruise on the Norwegian Crown. Just found out about this fee on line - not told by the cruise line, my travel agent or the airline I am flying - surprise, surprise. Hope that is the only surprise I run across.