If you find sufficiently nerdy people in the Nordics, these are all commonplace. Torrenting may be illegal in so far as you also end up sharing (letting people download from you), so the illegal part is actually distributing stuff. Maybe look into usenet instead?
In Finland we have no game renting services, as far as I know. Exchanging games is also a bit old-school, since most installs are digital downloads these days.
Account sharing, especially Netflix, has been very commonplace within families in different appartments / houses as well as between former and previous partners. Probably between friends as well, but it’s not something I would ask a friend unless they offer first.
Jailbreaking everything from iPhones to playstations has been commonplace for a long time as well as downloading pirated games. However there is always the risk of getting banned, downloading a virus instead of a game as well as bricking your device and voiding the warranty, but you know all that. Your fellow Nordic people won’t look at you funny if you do it.
It is customary to not discuss this openly in the company chat where you work so that you don’t cause trouble for your employer. Private messages about all these topics are ok, if both parties are onboard.
Especially in Europe with exorbitant electricity prices, it’s perfectly normal. The prices just went from like 4 cents per kWh to 40 or even 70 last winter. That made everyone count kWhours really attentively. Now the prices have gone down - in some cases a lot, but the reflex to check prices is still there. A lot of us now have stock-bound contracts, so whatever the current rate for electricity is what we are paying.
That means we all have apps (mine is on my Apple Watch) and whenever the stock price is low we start our saunas, washing machines, ac:s etc. Currently the price is 4 cents per kWh and since the price is determined 24 hours in advance, I can see that the whole day will have similarly cheap electricity.