Question! What about Amiga classic? Are there a community out there making 5 to 10 games a year commercial for Amiga classic?
I don't think so.
There used to be, but not anymore.
It's also a lot more work to develop 5-10 Amiga games a year.
C64 games are rather easy to make, once you've figured out ASM. Graphics only take a few hours rather than days. For me, the hardest part was always the audio.
Of course, the Amiga is a lot easier to code for, since there are tools like AMOS, Gamesmith (C/ASM), Amiblitz, AmigaE, TADS, Storm-C and the likes, whearas C64 developers are basically restricted to ASM and BASIC* (there are some nice and easy tools like SEUCK or Game Creator, but none can be really used for a commercial quality title. Although a bunch of people tried just that in the past and ended up selling not quite a lot of copies).
*There are also a bunch of C compilers like CC65 or Power C, but I wouldn't advise their use. 64kb isn't quite a lot of memory.