Manifold's current model is that a market creator must invest $X Manna to invest as I(initial), where this I(initial) serves as a modulating factor to start off the market. Manfold.markets (e.g. the Central Bank or Government) then pays market makers a flat $5 manna fee to the market creator for each new investor.

What if instead of this model, in a hypothetical Prediction Market Platform, the Central Bank or Government issues an I(initial) for every newly created market, making the market creation free for the creator or requires that a market maker invests a minimum I(initial), while also allowing the market maker to assess a flat fee for entry (which the Central Bank or Government could tax, for example, $10 entry fee, $1 tax goes to Central Bank / Government), or could assess fractional fees on every trade on their market, for example a $1 Manna minimum fee, with a 1% fee after 100 Mana, or descending fee schedule for large bets, something like that.

I suspect a lot of people will say, "Other." Please discuss your thoughts below.