Because their drivers are so talented, rich and handsome?
Actually, looking at the results. The rotaries are looking quite good.
Round 4 Qual: 1st and 2nd in GT500, 1st in GT300,
Round 3 Race: 2nd and 3rd in GT500,
Round 3 Qual: 1st and 2nd in GT500,
Round 2 Race: 3rd in GT500,
Round 2 Qual: 2nd and 4th in GT500, 4th in GT300
Round 1 Race: 3rd in GT500, 3rd in GT300
Round 1 Qual: 1st in GT500, 4th in GT300
So a rotary has finished on the podium in at least one division, In EVERY qualifying and race!
Now with a quick add up of manufacters points. (G500 and GT300, Up to round 3 Race)
Toyota: 135
Mazda (including RE): 99
Nissan: 84
Honda: 69