If you get clicks and the clicks do not translate into $$$, then they are considered as invalid ones for which you will not be paid anything. Beware : Too many invalid clicks in a shorter span of time may land you in trouble.
Google would not pay you on each and every click...particularly if it is coming from the same IP. Big G considers such clicks as accidental or invalid clicks! Regards, RightMan
how can you expect an answer from this question? you need to give LOT MORE DETAIL than that before people can help you.
Public Service Ads is showing when the robot can't find ads of relevance to your contect. Non-paying.