Info:
Code:
http://citycatalogue.com/pages/gameterms
Sumary:
Earn 200Euro by answering 200 capitals.
Earn 1Euro by every 120 points of your downline.

This web might be useful fo you to anwser their questions.
Code:
http://en.wikipedia.org/wiki/List_of_national_capitals
Join here:
http://citycatalogue.com/pages/gamecountry?from=8731

Pay via PP, check, WMZ,...