FWIW, there is now a line about this under "Key Features" of the APD deal, but that was added Wed afternoon (EDT), after many of us already purchased.
In my support ticket earlier Wed morning, I had outlined that there was no existing communication even hinting that the APD deal wouldn't qualify, and I requested that they add clarifications for this - IKM responded with "We have reached out to Audio Plugin Deals to add a disclaimer to the MODO DRUM 1.5 page on their site". This makes it seem like they did that in response to my request and/or other support tickets...so yeah, really not fair to retroactively apply that disclaimer to those of us who purchased the APD deal when there was every indication (from all of IKM's past deals as well as every term and condition we could find at that time) that it would work. UPDATE: in a recent support email, IKM confirmed that they had reached out to APD with the disclaimer before the promo went live, so good on them for that. That being said, that doesn't change what our situation was as customers, so I believe the rest of what I've said is still valid!
Also agreed that only counting cost paid instead of the product's value opens a huge can of worms, and is not how past IKM promos have worked (and as a web developer myself, that change seems like a crazy pain to implement ?). That's not to say IKM can't change what they do - it's awesome of them to run these promos in the first place! - but why not just add a line or two to the promo description to make this clear? (The current wording actually says "value" everywhere and mentions nothing about price paid - e.g. "register your purchase and choose three more software titles of equal or lesser value".)
I am not questioning the actual legality of how IKM is handling this, as that "IK Multimedia reserves the right at its sole discretion to terminate or modify the promotion" line basically lets them do whatever they want. But I am very much questioning how IKM is living up to its "Musicians First" tagline.