If someone is interested in a comparison - I finished replacing all my adfly links to linkbucks yesterday.

Bottom line:

approved clicks - about 30 less than the average last 2 days in adfly, but finished replacing all the links at 3 pm so I missed a significant amount of clicks.
I'm sure today I'll get much more with linkbucks.

Average CPM - My CPM is higher with linkbucks, plain and simple (by about 20%). Even for the US They pay a solid 2.4 while adfly pays sometimes 2.6 and sometimes 2.2(less than the "RAW" Rates).

For most of the "middle - class" countries (Small Western European countries, Israel, Asian countries) linkbucks rate is much higher.


So the conclusion is, Linkbucks is better than ADFLY.