I believe this new gTLD registries will manage it to finally sink their own boat. They are behaving so greedy that this new gTLD will never become popular. But then it wont take long until the first registries will close shop and this will be the end of this whole ngTLD scam. Because nobody will invest money to market a domain which might not exist anymore in a few years.

There are some proposed safeguards built into the rules to prevent this meltdown caused by failing registries. But looking at how the industry currently behaves I don't think the will to stand to the rules and grab as much money as they can and leave the sinking ship asap.