we simply cannot scale profitably without a benchmark set against spend. More to the point: The larger a campaign gets, the larger the workload to manage. As results-driven marketers, everything we do is based on data-driven optimization. Every dollar spent is a data point and every data point requires action. The more you spend, the more work involved in managing and optimizing the campaign.The benefit to both of us is you’ll never choose to spend more without a high-performing campaign. So, the system ends up being meritocratic in construct. And, because we charge a base, plus a small percentage (unlike many high-end agencies that simply charge a much larger percentage across the board), our campaigns become more profitable as a percentage as you grow. As far as the agencies that don’t charge a percentage fee… They’re actually showing their hand in doing so. They’ve completely limited their ability to service the campaign.