What can I say ? all of the above.
I think Biab is Peter's first born so it is the favorite, the promotion and selling is "all about" Biab everywhere you look, but the second born does not get much of the attention as it's not promoted.

Do you see Promos "by Callie - PG Music" in Realband Forum ?
this was the latest
RealBand 2015 has Arrived!
by Callie - PG Music

This is the latest video.

RealBand 2014 Full New Features Video
Date: 12/9/2013

You can buy RB standalone here but it's last years version.
http://www.pgmusic.com/realband.htm

I think RB has to come into a right of it's own and not just some add-on for BIAB that most users don't even know about.

Sure it has it's problem, which I try so hard to it get improved year after year. . , but until I can generate up realtracks in a sleek DAW I will stick with it.
Users that come to Biab after being accustomed to DAW's find Biab an incredibly steep learning curve, where as RB is a no brainer, you can SEE & TOUCH the tracks, all 48 of them.
Just like Suzi said "Tracks, Tracks, 48 Tracks !

So that's why I thought it needs to be Promoted www.realband.org