The script is now: http://l-stat.livejournal.com/js/pagestats/DR_v4u2.js
You can prettify it up for viewing and examination using: http://jsbeautifier.org/
I've not yet found (nor made) any analysis of the code therein, but the script does show up on all non-SSL LiveJournal pages for my permanent account, so whatever it does affects paid journals and the viewers thereof, not just Plus/Basic accounts.
Reference posts: one post by shatterstripes, two by xlerb.
Also, this script still follows an optout that you can use in the console (NOTE I AM A DITZ AND ORIGINALLY MIXED THIS UP):
set opt_exclude_stats 1
You can see a response from dwnewhall here:
The driving revenue script is designed to add our affiliate ID to any outbound link that doesn't have one. This should not affect anyone, and is a transparent process. The last time we tried this the process did not have enough testing. We believe it's been thoroughly tested and works correctly now. If it's causing some sort of a problem, please open a support ticket so we can notify our engineers.