thanks for the confirmation @Nick !Each campaign in Kintura needs a route (what landing page/offer you're sending the user to).
For the IVR offers if you're using the Traffic Company landers that are hosted by them then no you wouldn't have a lander. You'd link straight to the offer. However, I'd suggest hosting the landers yourself for better monetization. If you don't Traffic Company is monetizing them and not paying you for push subscribers that sub on the landing pages.