m0useanswered grow question 4 months ago its an interesting contest, they pick who joins vs just hitting join now. would be a good start for most if not all contests here by brands, can let them manage their own and prevent the trolls spamming it with fake diaries.
This would not be the first time contests have disappeared from the main page. almost always they can be found by scrolling down and finding the month when they where launched, I think I have only seen one fully removed from existence even when the link was used it was a 404 error.
most of the time they can still be found on the suggested other contests banner on any other contest thats active..