Good point! The problem I see here is that they are fueled by BTC 'leaks', so we can possibly pay their miners indefinitely with enough weak hands on our side
Nobody in their right mind will invest in altcash shitcoin that is forked every other day. People that buy it are speculators trying to play pump and dumps. They'll be the first to abandon the sinking ship at the first sign that Ver and Wu run out of bitcoins. Slower bitcoin blocks = less bitcoins to sell. Everything is self-regulating and the final outcome will be altcash fiasco.