I think the line regarding the demos is that you can't render them out and call them yours. You can however, load it in BB, and then change the tempo, style, key, the chords, etc and by doing that, you are good to go.

I have noticed that they are designed essentially to demo the style and they are not necessarily songs ready to go, because they lack proper song structure in most cases. So I use them for inspiration. DO I like the demo's groove and feel...? If so, could I see working on a song in that style? If so.... maybe it's worth a look see.

But to be totally honest.... I think I've only ever really completed a song using that method, one time. Most of them are simply ideas that eventually just end up in my yearly folder that didn't really get off the ground let alone morph into a finished song.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.