The second bullet point under Product Features at the top of the page directly credits "Mutable Instruments Plaits sound engines".
-- homeslice1479

You are right there is mention of MI in the product features "20 digital oscillators including 15 Mutable Instruments Plaits* engines for infinite sound creation".

Also the license for MI Plaits is the MIT license (see: https://mutable-instruments.net/modules/plaits/open_source/ ), which means that license should be included in the derived work, but source code need not be. Fair enough.

But then you had to say "Don't be a hypocritical cork sniffer here." Now that's original.