They're not saying there are none on the road, just none that are insured by them, which is an indicator of how many may be left. The ones that are left are most likely being insured as regular cars, not classics, which indicates that they are most likely to be junked instead of restored. Based on e-bay, there are a few GTAs that appear every now and then, more than the Alliance sedans and Encore hatches, which sold in better numbers.

They also have listed the Mazda RX-2 and RX-3 in previous editions, but now they are popping up more and more on E-bay. They don't list the R-100, RX-4, Cosmo, or the piston engined variants 808 and 618. All of these are more rare than the RX-2/3.