I like to keep my music computer as clean as possible and not add unnecessary complexity layers. If I can go elsewhere to get something that gets the job done without iLok, that's what I'll do. I'm not sure how Machine-bound challenge-response works - but any solution where I don't have to pay for a piece of non-sounding hardware that lives in USB ports is intresting.

I actually have a Steinberg USB dongle for C4 already - that's a hard one to say no to. Could it be used for this purpose too? And the Logic/Sonar/etc dongles? Probably a harder nut to crack for you but better for your customers.

Of course I want you to get properly paid for your work, this is more about not adding complexity/thresholds/sales stoppers for the people that like to pay. Perhaps we already talked about all this last time (Neon) I don't remember.