Those that Plus and those that don't. Regardless of which camp you fall into, SCEA might have an offer that will twist your arm. It's offering a free version of Telltale's Jurassic Park: The Game (that's all four of the game's episodes) to anyone that purchases a year of PlayStation Plus between November 1st and November 8th.
The game doesn't release until November 15th, but you'll be sent a message prompting you to download the adventure as soon as it drops.
Sony pitches the value of the offer at $29.99, which is certainly not a sum to be sniffed at. If you're already a PlayStation Plus subscriber then you can still take advantage of the deal, as subscriptions stack. For example, we're paid up on our Plus subscription until 2012. If we bought another year's worth, we'd have until 2013 and so on.
So you can pretty much get Jurassic Park: The Game for free, while extending your subscription if you want to. If you're interested in the game and enjoying Plus, seems like a no-brainer.
You'll find more information over on the PlayStation Blog.