It is 40 mph faster on average than NASCAR. It has more technology as I have written before here and here. It is "greener" using ethanol. It has a rising female star. It has more international competitors and international following. But IndyCar racing does not have a lead sponsor.
In recent years, AT&T, Qualcomm, Oracle, Accenture have all signed significant stadium or player sponsorships. IndyCar sounds ideal in many ways for a tech vendor.
Only $ 50 m over 5 years. Would be a blip on most large vendor's SG&A.