Start a WordPress blog or a YouTube channel about grand strategy. Request a press review key from Paradox PR. If you have 5,000 subscribers, they will likely give you the game for free. This takes effort, but it is 100% legal.
The between EU4 and Project Caesar
Paradox runs a "Free Weekend" for their major titles 2-3 times per year. When Europa Universalis V launches, expect a free weekend within the first three months. europa universalis v free
to learn the ropes before trying to manage a massive empire. Watch the Demographics: Start a WordPress blog or a YouTube channel
Likely free-to-play business models (with evaluation) europa universalis v free