I am really surprised (but also relieved) that almost no one here supports the idea of a subscription model. If you are only focusing on a few Paradox games instead all of them at once, the DLC model is much cheaper overall even if you get them at full price. Besides, you also need to take into consideration that a subscription model would be competing with all other offers on the market (Netflix, Disney+, HBO, ...) which could be a very risky move for Paradox.
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