You should get used to that, if you want to get high rate per click. You should do keyword research and get those high paying keywords.
yeah I have a high paying keyword site with unique articles just a little annoyed after delivering 5,229 impresions in the last few days and getting a low ctr and low paying clicks although seems it's starting to go up the amount not by much there paying me on this new site I think I will probably opt for some sponsored ads instead which my realestate blog had this many impressions would be making a mint lol and yep payments have gotten lower on adsense my other high paying keyword site tells me so :-p