update the usegalaxy.* requirements

Like we talked about in the Direction Summit.

content/usegalaxy/index.md

@@ -45,7 +45,8 @@ We want to see servers meeting several loose requirements to be considered part
 - *Updated*: These servers commit to updating Galaxy within 90 business days after new releases.
 - *Freely accessible*: these servers may not place restrictions on access or registration, anonymous usage must be permitted.
 - *Public infrastructure configuration*: we hold ourselves to a very high standard. Everyone should be able to reproduce what we do, and we commit ourselves to securing our infrastructure using best practices and in the eye of the public.
-- *Common Tools & Reference Data*: once work in progress finishes, these servers will share a common set of tools, and must provide CVMFS reference data.
+- *Common Tools & Reference Data*: once work in progress finishes, these servers will share a common set of tools, and must provide the Galaxy CVMFS reference data.
+- *Share Matrices*: The servers agree to share matrices like number of registered users, active users etc to contribute to the global Galaxy dashboard.
 - *Functional*: the site provides >90% uptime as monitored by the [status page](https://status.galaxyproject.org/), and participates in automated cross-usegalaxy testing initiatives.
 
 We're excited to see new services join us!