It's how things are with consciousness. The Transcendental Self motivates the Social Self and the Sensorimotor Self. The Transcendental Self is the very source of motivation, the driver that animates the human mind. It is fair to say that Generative Realism is a motivational theory of mind rather than an existential one like Sartre's. But Generative Realism is focused on the source of motivation.
Transcendental motivation is the motivation behind or beyond ordinary motivation.
The second purpose of the Transcendental Self is to provide the function of ontological transitivity , the reciprocity between objectivity and subjectivity. That function allows transcendental motivation to be executed, and to be satisfied. A motivation that could not be satisfied in principle, ever, would be a sorry kind of motivation. In fact we do enjoy satisfaction from time to time, and we can attribute that to ontological transitivity, a function provided by the Transcendental Self. In Generative Realism, transcendental subjectivity is not the negation of being, nor is it nothingness.