Marketplaces often flop when the people who build them don't fully understand the market they're facilitating. I think the exercise in the brokering of selling

Marketplaces often flop when the people who build them don't fully understand the market they're facilitating. I think the exercise in the brokering of selling newsletter ads, even on a small scale of one or two customers, will be truly valuable in achieving understanding of the needs of the platform before you dump precious time and resources into building it. I wouldn't write off that idea too quickly... As an added bonus you can make $$ doing this from day 1, before you even have a product.