It was always in the long term plan though. Maybe not at the very beginning when Google ran their index out of a dorm room, but ads as monitization must have been the plan very early on, even if it took some time to work out the implementation.
> The goals of the advertising business model do not always correspond to providing quality search to users
> For this type of reason and historical experience with other media [Bagdikian 83], we expect that advertising funded search engines will be inherently biased towards the advertisers and away from the needs of the consumers.
> Furthermore, advertising income often provides an incentive to provide poor quality search results.
And most importantly
> But we believe the issue of advertising causes enough mixed incentives that it is crucial to have a competitive search engine that is transparent and in the academic realm.
I think especially the last statement shows very well that they were ideologically opposed to advertisement-funded search engines.
In no way. The last statement very clearly is ambiguous, and does not preclude the creation of ad-driven revenue. They are in fact saying, "These are the problems with current ad-driven search services" and very heavily implying "we're going to do it differently."
