The main reason is likely account sharing. The same limitation applies to if you try using the same account on different devices.

You should be able to run multiple games on the same PC easily.

Can you not tie it to the active token session, so you can still recognize it’s the same user? Or something similar?

引用自 William Shakesman：

You should be able to run multiple games on the same PC easily.

The issue is that you can't. The moment you start another game, you get the message: "You are already playing another game. Please end it or end this session

引用自 QuackMonster：

Can you not tie it to the active token session, so you can still recognize it’s the same user? Or something similar?

I would assume they could. In the same way Steam could make a bunch of changes. There could also be world peace, with no laws needed due to being a perfect Utopian society with nothing bad ever happening.

Short story, asking is fine, but they'll almost certainly only change it when it stops working.

Depending on some games and their anti-cheats, you may come across that issue but you can play up to 30-32 games at once on the same PC.

You can have many games running at once on the same system. Games with anticheats may restrict to one game at a time that is protected with the anticheat.