One thing to know is that Manwin (youporn, pornhub, etc parent company) is located in Montreal.
For a reason I can't really explain, you mostly find PHP and C# developers here, so most Montreal startups are PHP based.
I also interviewed a couple Manwin alumnis, and they told me that they were a couple hundred developers and that there is a huge turnover (you often see a 6 month / 1 year experience at Manwin when you read a PHP dev resume).
So it's easy to understand that they prefer to use the local dominant language, it do not mean that Perl is globally dying, just that they have specific constraints. And to be fair Perl is not the only small community in MTL, Ruby and Python also have a strangely small community here.
Same here in Vancouver; I always figured the C# part was just our proximity to Redmond (and then PHP because it's the only language that doesn't impinge upon C#'s niche) but I guess it's more of a Canada-wide thing. Weird.
tl;dr Perl devs seem to be in short supply country wide, along with jobs that would need their skillset.