I did some playing around with grafana. This data is all just number of signups per day, grouped by instance.
Here you can see our recent spike in users compared to normal:

Adding in some other large instances we all got an increase in traffic, but ours seems to be more sustained:

And for completeness, compared to all of lemmy (as visible by lemmy.ca, so only things we federate with):

Reddit's announced some more changes but I suspect the whole tariff situation is pushing Canadians extra hard.