> For example, a fixed reward split between a growing group of miners will also cause a rising price floor. The miners will not sell for less than their electri

> For example, a fixed reward split between a growing group of miners will also cause a rising price floor. The miners will not sell for less than their electricity costs, which makes the smaller piece of the block reward they receive have a higher price. No that's not how markets work. Miners will sell at the best prive they can get. If they cannot cover their costs, they'll stop mining and the difficulty will drop until mining is profitable again. The resulting mining rate may be too low though to secure the network, bug that's a different topic.