As Ant will point out repeatedly, even once you DO buy the pass, if his last pm to me is any indication.

As for ending songs, I've done two different things. Now that I have the all access pass, I've been just getting the mp3 mixes and fading them out in audacity. But before I had the pass, I was recording the music straight off my sound card using a very useful program called "Ask and Record".
Using Ask and Record, you record the song "live" as it plays in Jam Studio. That means you can add instruments right in the middle of a page, fade out each instrument manually, and the like. I was able to get some really complex endings using this. Unfortunately, there are playback errors when you play a very high-tempo song in Jam Studios, and the Recording software records all the mistakes as well. So you kind of have to download the mixes for them.
Also, you should definitely buy the pass. Not necessarily for the mp3 mixes, but for the rights to your songs. I'm glad I did.