Funny, I don't remember seeing any notification about that. Was it not communicated to the account owners?
I just went back in the announcements archive, all the way to 27 Jan 2004, but found only stuff about downtime, DDOS, and viruses. In the monthly newsletters, the only mention of "policy" refers to PHP-CGI (Jan 2004) and spam (Oct 2003).
I would have thought that a policy change that has a direct cash impact on account owners would be announced, but perhaps I am wrong...