In reply to Samuel Aguilera (@samuelaguilera).

I'm not taking sides here, but I want to clarify that your statement #2 about "only the plugin owner having the commit access" is false.

A plugin owner / admin can give other users commit access by clicking on the Green Admin button that only the plugin owner sees.

Also it's important to note that Authors / Committers are completely separate in the way they're handled.

List of Plugin Authors are controlled via the Readme file in the plugin. The committers list is maintained by plugin owner on wordpress.org site for that individual plugin.

Simply add /admin/ to the end of the plugin URL, and you will see the admin page.

Also clarification on #3 -- each plugin has a support forums RSS tag that you can use to be notified if you have multiple support staff members.