The current deal is that we can buy any of the listed play series instruments and get another from the list for free.
The Bazzazian tapes instrument interests me, but none of the others.
Your demos on the NI site use beats from the bazzazian expansion, and when you listen to Bazzazian on the video in his studio, he even talks about the expansion as complementing the tapes play series instrument. This all makes sense.
So why no bundling offer, or are you planning one?