Had a bit of a eureka moment; this:
Is showing a vortex created by this:
F1s barge boards have some key differences to the strakes, namely the sloping face, but air hits the face, some spills over the edge into the low pressure, and the rest is pushed along towards the end, creating a vortex directed outwards. I think Ferrari's are much milder, and don't spit out a tengent vortex, but the idea seems to make sense to me. I'm thinking it's working along the same lines as a slat style vortex generator, like those found on aircraft wings. The American society of Mechanical engineers has a research paper on exactly what ferrari is doing, I'm going to see if it lets me access it or if I need to register
Aerodynamics of Large-Scale Vortex Generator in Ground Effect | Journal of Fluids Engineering | ASME DC
If I can figure out my student license with AutoDesk's CFD I'll test out a model of the curved strake and post here