While it is natural for us to be irked (or worse) by NCSoft here, you have to keep in mind that the sticking points may have been someone from PS's.
Very true.
The thing about sticking points is, they are not necessarily anybody's "fault." Sure, if we're talking about compromise between somebody who wants to murder 100 babies and somebody who wants to keep them all alive, the wannabe-murderer might be willing to "compromise" by killing only 50 of them, or even only 10! See how far he was willing to go to compromise? It's that guy who doesn't want them murdered who's refusing to compromise, who is stuck on the "sticking point."
That example is deliberately designed to make the dual point of how compromise can be a bad thing and how the one willing to do so is still the bad guy.
In other cases, it could be as simple as, "I cannot in good conscience agree to sell this car for less than $5,000. If I do, I will not be able to feed my children next month, and there are ways I can get at least that out of keeping it despite not wanting to use it anymore," vs. "I cannot buy this car for more than $500; it's in rough shape and has a limited but specific use to which only I could put it, but if I spend more than that I won't be able to afford the repairs and the gasoline to make it run."
Neither person is being unreasonable. There's just no common ground. The best course is, in fact, for the car's owner to keep it and milk the $5000 value out of those other avenues.
That doesn't mean that NCSoft or Paragon were being both reasonable, nor that the difference
needed to be insurmountable. We simply don't know. But it's possible.