Unity License Payment Terms

I am looking at game engines to start developing my game and one of the things I am looking into are payment terms. Unity’s seems fair but vague in a few sections. If I were to build my game in Unity and the game earns more revenue than 100,000$ gross, would I have to pay for the pro license even if I never used Unity again? Also, if my company were to grow and earn more than 100,000$ gross, would we then have to pay for the pro license even if we were no longer using Unity?

TL:DR: My question boils down to, do I have to worry about paying for the Unity Pro license forever after making one game even if I never use the engine again, or is the license only for the right to use the engine to develop further games.

Well, to those who may still be following this question I have been digging further and the more I read the EULA, specifically the financial threshold section as seen here.

https://unity3d.com/legal/terms-of-service/software

I’ve noticed that it states that the thresholds are there for the use of the engine for development. Which leads me to believe that you don’t have to worry about being charged in the future even if you no longer use Unity. Though I am still not positive, I think this is enough for me to start playing with Unity and see if it will work for my project.

I asked the question on another thread… how would Unity know when/if I reach those turnovers (it is not per title, it is all titles/assets created with Unity, within the 12 month period) ??

Don’t get me wrong, I am perhaps one of the most honest of people and wouldn’t hesitate to upgrade my licenses, my question is based upon curiosity.