In Epic's license: > 7. The Agreement Between You and Epic > a. Amendments > If we make changes to this Agreement, you are not required to accept the amende

In Epic's license: > 7. The Agreement Between You and Epic > a. Amendments > If we make changes to this Agreement, you are not required to accept the amended Agreement, and this Agreement will continue to govern your use of any Licensed Technology you already have access to. ie unlike Unity, once you agree to this, you may continue using the engine you licensed permanently under the current fee structure. Companies should prioritize stability like this.