A consumer platform vendor wants to create a platform based on the open-source Genode system. That is, the base system is AGPLv3 and all drivers and the software stack are open. Still the vendor wants to create a distribution channel for proprietary applications (an app store) or other digital goods (games, movies). In this case, the vendor could seek an exemption from the AGPLv3 for its app-store application in exchange for letting Genode Labs participate in the commercial success of the consumer platform. Under this model, Genode would indirectly benefit from the proprietary application vendors. So an exemption is granted for a tangible benefit for Genode.
As another example, for some software the source code may got lost. So it becomes technically impossible to comply with the AGPLv3. The ability to combine such software (e.g., "abandonware") with Genode should not pose a problem.
there is a common practice for hardware/software complex developments in Linux world. Simple example: Ebooks from SONY. The SONY uses Linux kernel and minimal runtime for ebook boostrapping. On top of this open source software, Sony develops own proprietary software (in fact, based on java). In accordance with licenses, SONY publishes all sources, except, of course, own proprietary. This is very simple and profitable. The community could have an ability to run own software instead of proprietary, SONY decreases costs and significant decreases time-to-market, license trolls do not have an effect on the SONY. Everyone is happy.