cpm advertising requires that an advertiser pay for their ad being served. for example a $10 cpm is equal to a charge of $10 for every thousand times an ad is served.
usually cpms are sold in 50,000 - 1MM impression increments. a $10 cpm for 100,000 impression would cost $1,000.
cpms have nothing to do with clicks. in fact, there is no quarantees that your ad will even be seen, let alone clicked, but you will still be paying. the only thing that is guaranteed is that a page view or impression will occur that displays your ad.
So therefore the view doesn't have to be unique? that is it can be from the same IP address.
If so, can I setup a macro to have someone keep on hitting reload? How about that cost per click one (I forgot what its called : ) CP..C?) How do we know its not the same person clicking a million times?
Sure people that set up macros or click parties may make a little money short term but --
1. it is hard to get money unless you are established because people will not trust you to spend ad bucks on. 2. when ppl buy clicks or impressions they will normally put a cap on what they are willing to pay 3. if you do any of the bs mentioned then the advertisers ROI is going to stink and they will never do business with you again // possibly telling people in the industry they know not to do business with you.