eCPM dropping day-to-day

[initialdheaven]

Hey people,
I have a question here,
my eCPM drops from day-to-day, and sometimes, it drops during the day.
Like, this morning it says 37$ CPM, but by now (night time), it's at 8$ ish.
Anybody knows why?:mad:

[fdlinda]

That happens to me too :( I have seen it up at around $80 but always finishes at under $1! I always figured it just averaged out over the day but I don't really know.

[azn_romeo_4u]

that is a very high ecpm, must be mean high paying keywords and extremely high CTR. I wouldn't complain if I was getting an $8 cpm.

[fgs]

It is because as the day goes on advertisers run out of the daily budget and the lower paying ads get higher placement thus bringing down the average cpm