Let’s say that every additional sales rep at a hypothetical startup adds another $1 million in revenue. The math is easy; if the startup wants to grow $5 million more in revenue, it should just hire five more salespeople. As it turns out, however, one or two marketers who can help create demand and pull can take a startup from $1 million per sales rep to $1.5 million per sales rep—because marketers help the sales team become more efficient and more productive.