Very interesting !
Have you considered - that you can rent MH/s for hours or days to help the coin - this could be another angle to use for the investment pool ?
That is also very interesting and a good idea. If the devs would earn BTC from some sales, they can indeed rent some high hashpower to keep the network healthy.
What a stupid idea. Miners are not going to compete with developers who already have over 90% of the coins.