I've read a lot of this thread since I do have foreign transactions charges. I did a search here and elsewhere on FT for "settlement", but did not notice any posts about the class action lawsuit to recover some of the foreign conversion charges that Diners Club, MasterCard and Visa have made us pay since 1996. I received an extra form in my mastercard and visa bills last month, but no one here seems to have mentioned it yet. If it is covered elsewhere, the moderator can move or close my post. If you are interested in recovering some of the foreign conversion charges and it seems many of you have had substantial charges, see the link below.
https://www.ccfsettlement.com/claim/
-outoftown