I don't see this as a problem. We have a marketplace of marketplaces of ideas - yes, Reddit is a big one, but there's HN, Lobste.rs, even slashdot is still aliv

I don't see this as a problem. We have a marketplace of marketplaces of ideas - yes, Reddit is a big one, but there's HN, Lobste.rs, even slashdot is still alive and functioning. If rigid bans on self-promotion are harmful, Reddit will die and more marketplaces of ideas will spring up to take it's place, like blades of grass on the prairie. We don't need every single social network to become an outlet for startup self-promotion.