What's the difference between server ad request and ad impression?
Not every request to ad server ends up with ad impression. On average it takes 1.5-2 display requests and 6-8 video requests per one impression. Hence, even having 0 activity you still may get a bill for ad serving with significant figure. AdTarget eliminates such risk, because it charges you only for actual impressions served.
Does AdTarget AdServer support programmatic?
Programmatic buying and selling is a part of respective DSP and SSP products. Both of them are integrated with Ad Server and can be activated upon request.
I cannot predict how many impressions will I have next month, - what to do?
No worries, unless you are using additional features, such as white label or team management, at AdTarget AdServer product you pay only for actually delivered impressions.