Should Manifold take a ~25% cut of added liquidity subsidies (excluding initial ante)?

One way of viewing prediction markets is that they're a service provided to the question asker. In this model, it makes sense to charge the asker for the privilege of getting the market to answer their question.

Unlike transaction fees on trades, charging the subsidizer is a friendlier, progressive tax that only those with higher mana balances will end up paying for. (Mana-poor users typically don't subsidize their markets.)