The 100k figure includes sales worldwide since launch (2012-2014), not just the last year.
In contrast, he Honda S2000 only sold
110K units worldwide during its whole lifetime (about 10 years).
In 2011, Mazda said they had sold 900K Miatas since 1989. I don't think they have reached 1M yet.
So all in all, I'd say the twins are doing pretty good.