Search looks strongest in the short term and weaker over the full payback

    Generic PPC share of ad profit

    22.5%

    short-term

    →

    14.6%

    full payback

    Generic PPC has one of the best short-term profit ROIs (£2.29) and the largest share of short-term profit (22.5%), but its share of full profit drops to 14.6% on 18.9% of spend, because so little of its effect is sustained.