We are looking to expand this trusted group of Snort rule contributors. When we have a rule we’d like to deploy “in the wild” we will send these rules into these environments. The rules we send to you will be governed under the VRT license, and may not make it into the official VRT ruleset. As an added benefit to being a member of this group, well be giving you access to our blacklist IP ruleset. This ruleset contains about 3 Million IPs, and will change by approximately 20,000 to 100,000 per day.”]
Source: https://blog.snort.org/2011/10/vrt-is-looking-for-more-good-test.html