Is it exempted?
From https://aws.amazon.com/lightsail/faq/
> Lightsail uses burstable performance instances that provide a baseline level of CPU performance with the additional ability to burst above the baseline.
From https://aws.amazon.com/lightsail/faq/
> Lightsail uses burstable performance instances that provide a baseline level of CPU performance with the additional ability to burst above the baseline.