Yes, you understand.
1. Having AIs in the game.
2. Building multiple training facilities on each planet in a sector (moons) to multiply the training rate.
3. Retroseries building.
4. Surrendering to allies to merge empires together.
5. Surrendering to an ally or other 3rd party to keep what is left of your empire from going to the enemy.
6. Surrendering your empire when you just want to leave the game.
7. Surrendering to the empire attacking you.
8. Intelligence projects.
9. Gifting/trading planets.
10. Tech sharing.
11. Gifting/trading population.
12. Gifting/trading colony techs.
13. Min/maxing empire setup.
14. Allies laying mines in the same sector to get more than 100 mines in it.