I think you are just describing a basic feature of all CD writing which
isn't limited to just audio blanks. All CD writers look for this wobble.

Possibly, but we're describing a class of audio CD writers which will
refuse to write if the wobble is absent. I think the idea was that you
paid extra for the eccentric writeable CD's and that extra was then paid
as royalties to the artists. If you tried to avoid the royalties, by
using cheaper, non-audio blanks, then some writers would refuse to write.

--
Steve Swift
http://www.swiftys.org.uk/swifty.html
http://www.ringers.org.uk