JetBlue TrueBlue - Can you get a fare reduction credit using Jetblue Cheeps?

The answer is probably no, but if I've purchased a ticket somewhere and I see a Jetblue Cheep sale going on can I get a Jetblue credit for the difference?

I think someone asked this question when the Cheeps first came out (there's a post in this forum about it, I'm pretty sure). Consensus was that you'd be able to get a credit for the difference.

Here's the thread that discusses it:

http://www.flyertalk.com/forum/jetblue-trueblue/971554-anyone-know-what-jetblue-cheeps-twitter-will.html

There was nothing definitive there other than my opinion. I still think I'm right but someone would have to test it and report back to confirm.