I don't. Third cars are a terrible idea, and always have been.
Imagine a season like last year, where one team is head and shoulders clear of the rest. Suddenly, every race is an easy 1-2-3, and you've eliminated the interest of who can snag a podium. Last year was bad enough, but at least the other teams were closely matched enough that there was still some excitement over who'd get the final podium spot.
Plus, third cars probably increase the chance of team orders too.
Indycar has multiple 3+ car teams. It works.