Quote Originally Posted by lifeplayer

Yes. But on the other hand, if you are not having huge traffic, then you can earn nothing from CPM. You shall know that the CPM might pay you around $1 per 1000 impression, but CPC might pay you $1 per click
it is ppc.
for example bidvertiser,you may earn 1$ per click from visitors.but it is so hard to let them to have a click.