Ottawa, as Canada's capital, seems fair to include. At (metro populations) of 1.3M it isn't too far off Helsinki's 1.5M – but given Helsinki is Finland's most populous city on top of being the capital, doesn't make sense to exclude it. So maybe swap Winnipeg/Quebec for Helsinki/Stockholm, but Ottawa I think is fair game.
Giving them the benefit of the doubt: I wonder if Stockholm and Helsinki came down to % of the population who subscribe? Maybe the available data was considered too low volume to be representative? (Or they were just lazy and biased towards North America.)
As for Quebec and Winnipeg ... somebody on a FaceTime meeting must have dictated "let's take Canada's X biggest cities by population and include them?" Only thing I can think of given those two are both in the 800K range. I can
sort of see Montréal's and Quebec City having different enough music tastes, given Montréal is the more English-influenced culture of the two (from my limited exposure.)
Anyway, as somebody from
Edmonton I am glad you didn't name drop us for "wtf is that on the list"

. (Edmonton is basically the same size as Ottawa.) Perhaps it came down to an honest "WTF is an Edmonton?" in reading through the list haha.