I think it's quite a nice introductory deal to get JIRA and Confluence for $10/month total for 10 users, since they let you keep that price regardless the time

I think it's quite a nice introductory deal to get JIRA and Confluence for $10/month total for 10 users, since they let you keep that price regardless the time you've been using it. I don't think making a comparison to the price for 11 users at $7/user is really fair.