So is there an eternal hell or not?

[MangusKhan]

Thus, those who are indifferent in your density are those most to be mourned, for as they eat and drink and be merry without regard to serving others or the self, they simply continue in this density of experience, finding upon graduation that they have not graduated, they have not learned to love, they have not learned to turn towards the light, or to use the light. And so they shall be given—not hell, any more than third density is hell—but simply another third density experience lasting approximately 75,000 of your years.

I feel this really nails it. Then contemplate that the third density experience that they are given after failing to graduate may very well contain the karmic repercussions of the previous great cycle in which they partook. In the case of this planet, there are many things within the social memory complex(es) which will need to be smoothed out. Due to the confusing nature of the veiled third density experience, these things may, as a matter of possibility, not be smoothed out but actually amplified and compounded. So it would seem that "hell" is a matter of probability. These beings might end up in a very confusing place, and from there might end up in a more confusing place. Perhaps eventually there will be no choice but to serve self, upon which they will graduate negative and experience all the wonderful things which that entails. Just a possibility.