There's an archived version from February 17th available here: https://archive.is/BkOJv

As you say, the pay rate back then was 0.001 BTC per 10 posts for Heroes and Legendaries, so 1000 posts a week to max out.

The actual changes seem to be limiting the sections which users can post in and adding a bunch of extra bonus rewards. They also increased the minimum character count from 20 to 25, presumably to help cut down on spam. Even back then, however, it still contains the obvious lies about not paying for spam and removing spammers from the campaign.