I heard that too, but then I had a look. 
  
2016 US Sales Figures 
  
11,598 pa, average 966 pcm BRZ/FR-S 
9,465 pa, average 789 pcm Miata 
5,913 pa, average 493 pcm 370Z 
  
US sales figures from here 
 
  
so two cars made just 2k more sales than 1? 
  
was this before the new miata was released or after seeing as the miata NC had been out since around 2005/6 be interesting to check 2017 figures at end of year 
  
Either way 11k sales is poor considering the mustang sold  
105,932 units last year in the US  
 
  
And the impreza WRX sold  
33,279 just show the market isnt there for the cars