Maybe it depends on the marketing? I went to races in 2014 at Washington DC and Long Island, NY and I thought the crowds were terrible. I went to Belle Isle last year for a double header race and they have a very good crowd both days. I went to their race at Fair Park in Dallas this year, and it also had a very good crowd. So for me, its about 50/50 good crowds, bad crowds. Both of the races in NY and DC were promoted by the same promoter (Andretti Sports Marketing), maybe they did no promotion? I have no idea.
I also went to races in Vegas in 2014 and 2015, they had nice crowds as well, though I suspect a large number of tickets were given away at SEMA, so i really can’t judge that one at all. I truly believe the Dallas and Detroit events had good crowds though. The series is growing, and the fields of Supercars have been quite good the past few years IMO.
They always start 10 cars. In the FIA World RX series, they do get higher car counts, but they still only start 6 cars in the A-Main, so i think them starting 10 cars is quite good in GRC.

Hi – There were two grandstands at the track. I could see about one-third of the track from one stand and the rest of the track from the other. However, the cars were very far away at points from the second stand. My photo album will show you the view from each grandstand.

I always try to list some positives and opportunities for improvements (negatives?!) for each track I visit. I agree with you that if Red Bull leaves this group they probably wouldn’t be able to race without a top sponsor. I always say the “people vote with their feet”. I’ve been to several of these events. The crowds are small if there isn’t something else tied to the event like a music festival, etc. In Phoenix the crowds were super small.

Best,

Randy