I have "public service ads" disabled... So i might assume now goggle has 0 cent clicks...or 6 clicks would be 6 cents min?
This happens because of their click filter system. It is an automate to check clicking pattern and filter invalid clicks from being counted. That's why when you do check earning, you would see "estimated earnings" instead of exact number. Your earning can be changed all the times during invalid clicks filtered.
At times I have seen that Google has also increased the amount per click at a later stage of the day.
check you content if everything ok. thats because your robot.txt if you use wordpress try to find it in wp-admin
hey, the actual pay per click depends on many things like the keywords of your page, the visitor location and so on.