Not sure if Canadians are aware of this, but Canada does two things really well:
1) Developing its own domestic artists/musicians, to a much greater degree than the US (eg https://www.factor.ca/)
2) Greatly restricting smaller foreign acts (especially from the US) from performing in Canada for commercial purposes
Yes, point #2 also applies to the US, but it's not enforced. But if you cross into Canada with musical instruments, they'll put the fear of God into you.
This is largely why the phenomena you describe exists: artists can develop within their domestic cocoon, without being crowded-out by Americans, and then tour their larger, wealthier neighbor to greatly expand their profile virtually risk-free.
1) Developing its own domestic artists/musicians, to a much greater degree than the US (eg https://www.factor.ca/)
2) Greatly restricting smaller foreign acts (especially from the US) from performing in Canada for commercial purposes
Yes, point #2 also applies to the US, but it's not enforced. But if you cross into Canada with musical instruments, they'll put the fear of God into you.
This is largely why the phenomena you describe exists: artists can develop within their domestic cocoon, without being crowded-out by Americans, and then tour their larger, wealthier neighbor to greatly expand their profile virtually risk-free.