Should it be kept there as of right now? If it stays, when should it be removed?
Right now? Keep it. As long as we don't have our community ads we are not running a full fledged graduated site.
There have been arguments about when beta stops. In my opinion beta stops when we have gained every and all benefits from a graduated site. That said, beta pages should be removed when we're confident not a single part of the site could indicate we're still in beta.
We're almost there. But those pages don't hurt anyone if they stick around till we really left the beta phase behind us.
Note: This is all assuming community ads are indeed the only thing we're missing at the moment.