Second of all why would knc host for free and for life 3600 neptune customers?
I think they cleared that up - you only get 6 months. I guess that's how long they expect any of their hardware to last. Or you could wait until September/October/November/December/2015 for an actual 20nm, when it will be more than useless. Who will wait 3/4/5/6/7 months, when they can have their 3TH when promised, albeit without the actual hardware they paid for? Your butt might feel sore, but at least it hashes 
There is no logic in offering cloud hashing instead of products.
I'm sure you can see now there is, for knc. They own the assets, you own a very small digital share in those assets for 6 months, until their "debt" to you is paid. Then you own nothing. And they have an entire datacentre, full of hardware, paid for on your dime. Plenty logic, if you are part of the (must bring back the phrase):They can't offer customers only 6 months of 3TH because customers haven't paid for this. It's simple. They will either offer lifetime virtual 3TH or an actual product. The question is if they will force either virtual hashing or wait for product. That would be extremely sick! But i think they won't force it. The best way is to just offer virtual hashing until they ship the product and then they remain with the hashing. It's a win win for all. More win would be if they don't start the farm at least until half June, but i don't expect that to happen at this point.