You can use your Music Maker JAM tracks commercially without purchasing a licence, provided you do not earn more than US$5000 from a single song. If your earnings for a specific song reach this figure, then you will need to contact Just Add Music GmbH to discuss further details regarding the purchase of a 'pro' license to continue using the sounds.
It is also important to mention that it's not possible to obtain rights to our artist collaborations (JAM X)/songs created using these loops, and these songs also can't be shared outside the MMJ Community.