With almost every industry becoming freelance/on-demand, there are many marketplaces for things with clear outputs (engineers = give me an app. Designers = give me a landing page), but I don’t see a lot of marketplaces to hire growth teams or marketers to take products from 0 to 1,000 customers. Or 10,000 to 1 million customers.
Do these marketplaces for marketers exist? If not, could one work? Why or why not?