Earlier quoted context omitted.
But, had msft executed, there definitely is room for competitors for both dfp and dfa. Many pubs seem to want something, anything besides dfp. Plus the rise of ssps is (maybe?) a reaction to the pub adservers not innovating. For god's sake, openx (written in php!) is being used by pubs. also, hi (earl from qc)
Could you maybe explain some of those acronyms you used?
When a publisher (pub) sells ad space to an advertiser, there are at least two sets of servers involved. There is a publisher / sell side ad server (pub adserver) which picks which ad to show in an inventory slot on a page view and generally tries to optimize for the publishers income, plus does publisher side reporting. There is a advertiser / buy side ad server which does cross publisher reporting; allows the advertiser to control, change, and update creative; tries to do frequency capping; tries to do cross channel reporting; and tries to optimize on the advertisers' behalf. These are generally not the same server. Google's ad server were basically purchased from doubleclick. DFA is doubleclick for advertisers and DFP is doubleclick for publishers. Openx is a competing publisher ad server. Atlas is microsofts advertiser ad server; it competes with dfa.
An SSP is a supply side platform. It's a service that basically replaces a pub ad server and attempts to get as much money for the pub as possible by switching between ad networks and possibly trading off between guaranteed, network, and rtb. It basically is a saas stack that replaces a publisher ad server. An SSP will often also attempt to prevent first party data leakage.
a DSP is a similar beast for the demand side and can start to replace an advertiser ad server.
From my perspective (and I think many pubs) there hasn't been much innovation between dfp and openx. Hence the movement to SSPs.
First party data is, in a nutshell, the fact that a user visited a site or a page. From this you can derive all sorts of things such as the purchasing interests of the user.
guaranteed is presold ads, the most lucrative for a publisher