[yjftsjthsd-h]

Did you ever test doing nothing? I assume it's been studied, but I can imagine ways for 10% to actually be noise or seasonal/weekly/whatever variations.

[greatpostman]

Yeah that’s called the control. We have very sophisticated automated systems for measuring all of this

[hnov]

This is called A/A testing and is used to vet the setup.

[hiq]

I thought A/B testing was the state of the art in that field, which would address your concern?