How can I merge two commiters with different emails who represents one user?

Starting from Stash 2.5.0 you can use .mailmap file to do this. In order for the changes to take effect, the Stash administrator should disable the add-on and then enable it again.

How can I pay for a Community license?

What time zone is used for displaying statistics?

Awesome Graphs uses the time zone set for the Stash instance. If all commiters are located in the same time zone, you may want to set the time zone for Stash.

To do that, you need to:

1. Set the -Duser.timezone parameter for JVM on the server where Stash is installed. For example, -Duser.timezone=Europe/Berlin. Read more about JVM parameters in the Atlassian JIRA documentation.
2. Restart Stash.
3. Make sure that the timezone is correct in the Stash administration panel.

How data are indexed?

First, Awesome Graphs indexes default repository branches, then other branches and finally tags.