Rewards

How you structure rewards for your subsystem depends greatly on its scope. A subsystem resolved in a single sitting usually gives accomplishment XP unless it's particularly demanding, in which case it could be considered a full-scale encounter. Meanwhile, subsystems that span over the course of multiple sessions or the entire campaign might generate accomplishment XP at meaningful milestones along the way. If you have a long-spanning subsystem that is fairly low profile and behind the scenes or isn't success-oriented, such as a subsystem to track what type of fan base the PCs' touring aggrosynth band will end up attracting based on the PCs' decisions, you might not give XP directly from the subsystem since, in that case, “success” is undefined.