There will be structured bidding if demand for off exchange trades becomes high enough. I recommend placing funds on NuShare order books, but it makes sense to prefer direct trades for larger amounts as they can get a better price while guaranteeing funds go to the network. We obviously want the price to up from demand, but sometimes rather secure funds than leave them off the table.
Network is processed by NuShare holders, and actively voting (minting) shareholders adjust transaction fees and decide whether to issue new NuBits or NuShares. It’s in existing shareholders’ interest not to allow too rapid potential disruption in voting results. Limiting the rate of dilution limits how much and fast new shareholders can affect the network.