Its well known in AWE how to pump energy into a kite, and entire kite specialties like indoor kites and PG/HG step-towing, are based on this principle. Foil boarding has now discovered its own pumping potential, called Pump Foiling.
Recent videos even show kite pros pumping hydrofoil and kite at the same time. This is how to win a race in low wind. Expect future hydrofoils and kites to be even more aeroelastically tuned, ideally compliant to transmit pumping energy. Its a revolution.