You've provided evidence of (hard to say, I did not find a way to count them) maybe two hundred people that contributed and your belief that there is a similar ratio between contributors and users as there is for Perl5 and CPAN. I do not question your contributors, I question your belief that they are all still interested and especially the ratio for which you've got no evidence at all.
Perl 5 has lots and lots of wheels so there is a much higher barrier to becoming a contributor. You have to find a niche or believe you've found a way to make one of the wheels rounder or something. Nothing like that exists for Perl6. You've spent a day or two hacking, you've already created something different than all there is in the repository, you upload it.
Update: As I have nothing better to do I go through the git commits and looks like the 200 will be about right. If you'd remove the commits of moritz, tadzik, colomon and masak, you'd be left with maybe a quarter of the current number. It's kinda sad looking at the loads of people that make a few commits with in a few weeks, maybe a month, and then disappear. They are the majority. So far and I'm down to november (that's a name of a wiki engine written in Perl6) and there's 36 people that commited anything this year. Color me unimpressed, it's June!
Jenda Enoch was right!
Enjoy the last years of Rome.