some data to express my mind,
Day ¦ Display ¦ click ¦ CTR ¦ CPM ¦ earn
20060815 ¦ 926,006 ¦ 3,071 ¦ 0.33% ¦ USD0.13 ¦ USD118.63
20060917 ¦ 111,104 ¦ 493 ¦ 0.44% ¦ USD0.04 ¦ USD4.12
the CTR is increasing, but CPM is lower than ever. Can anybody know the reasons?