What is the Minimum "Maximum CPM" that you have to bid in Adwords in your country? In India it is INR 10...which works out to be USD 0.22.
In all currencies it is approximately $0.25 - and if you choose INR 10 it will be converted to $0.22 in AdWords system - so your ads will have a bit less priority of other that has bid $0.25 The point is that you do not get so many advantage of paying a CPM of $0.22 as you will get less impressions in a determined period. You can check yourself all min CPC values for all currencies using the link bellow: https://adwords.google.com/select/AfpoFinder What change more from country to country is the activation fee. hope this helps.