Edit: The requirement for reviewers to have asked 2+ successful questions has been removed.
For Staging Ground, a user can either qualify as an asker or a reviewer - never both. (Under some circumstances, qualifying as neither is possible, too.)
There are two criteria the system checks to determine your status:
- Do you have more than 500 rep?
- Do you have two or more "successful" questions? For these purposes, a question is "successful" if it has a score of two or higher, or if the question has been answered. It also must not be closed or deleted.
To qualify as an asker, a user must have fewer than two successful questions.
To qualify as a reviewer, a user must have more than 500 reputation and two or more successful questions.
It's worth noting that this system isn't set in stone. We're open to considering changes to the system for granting asker/reviewer access, and we have a couple to consider on our plate already.
Note: This may not have been accurate for all users on release day. It should now be accurate.