In reply to Sean Kelly:
> Could be a good sales gimmick as they hope that new users might update to one of the later versions.
I don't think there's any doubt that this is at least part of their motivation.
> Be aware that it might be time served, and might not work after the initial trial period has expired, which is what used to happen in the past.
I've downloaded 30-day trial versions of Lightroom in the past. There's no indication anywhere that this is the same.