How much money can you make in Formula Drift?

I'm curious to know, how much financial potential does a driver have in the world of Formula Drift? Are there significant earnings opportunities, or is it more of a passion-driven endeavor with limited monetary gains? I'd like to understand the financial landscape of this motorsport, particularly for those competing at the highest levels. Could you elaborate on the earning potential, any sponsorships involved, and the overall financial picture of a professional Formula Drift driver?