Judging from Twitter and forum discussions today, most of the remaining lifetime customers use other hosts for many projects, but retain their Joyent packages for sites with relatively minimal requirements: non-profits, simple personal sites, etc. What they paid for wasn't server specs or even the quality of service: it was the explicit promise, in return for paying a chunk of change up-front, of not having to think about hosting options or plan a migration while Joyent remained in business. You can't simply apply a per-month calculation for that.