Thaer how do you think to fight Nicehash? they ruin a coin!
Once a coin has a quick DAA, there is no financial incentive anymore for anyone to rent the nicehash botnet. Only a slow DAA allows nicehash to instamine a ton of coins at a difficulty which does not correspond to the hashrate, i.e. much too low, too cheap. It is then the other miners, which mine permanently, which are paying the price for the nicehash looting. The new DAA will hopefully fix that. If anyone still prefers to rent nicehash they will then have to pay the price. They will only get as many coins as they are supposed to get. Once nicehash does not have this unfair advantage due to a too slow DAA anymore, nicehash makes economically no sense anymore. They are always more expensive than having your own miners at home. They will still exist however because they make their money off those people who desperately want to call themselves miners because they own a few cards in a gaming rig, but are not willing even to learn how to run an executable from a batch file with a couple of parameters inside. Since these people also get their electricity paid by their parents, they don't care if they earn much less than they would earn if they mined like miners do. Nicehash is the solution for the peak ignorance tribe.
Of course if anyone wants to really attack a chain, he can still do it with nicehash even if the DAA works perfectly. But this is very rare since there is no financial incentive in doing so. Most people who buy hashrate there want to make money, not lose money for the lulz. And it requires additional skills which fortunately the vast majority of people doesn't have. Yes, there could be an incentive for an attack but only once a coin is popular, on the big exchanges and can be margin traded. Only then it makes sense to short it and then attack it. But by that time is has a huge global hashrate so that even the hashrate available for purchase on nicehash is far too small for a 51% attack.
