When do the feeds stop working for the season?
Well.. they really don't...
Real does what's called a RePlay or ReFeeds, and it's already begun... What that means is they start the feeds over from day one, and they replay the entire season. :)
It's a great way to go back and see the stuff you missed, or just feed the need for feeds in the downtime between seasons.
Also, real hosts interviews with several of the houseguests in the weeks following the end of the season. :)