Look, I don't hate Perl. It was my first real language beyond basic that I used for a long long time. But Perl's popularity peaked in the late 90s? Early 2000s? The failed Perl 6 adventure was about the time that people started fleeing elsewhere, like PHP.
Maybe Perl 6 was not even really needed and Perl is perfect ;)
They'll rarely advertise it in a job listing of course. They're looking for people with Java/C#/C++/Python experience, and there's certainly plenty of that, but also thousands of little Perl scripts doing ETL workflows.
Weird donation if you ask me. There are many many many more interesting languages that I would rather see succeed. Koka, Hylo, Vale, Whiley, Lobster, etc.