Immediate action required to maintain Drive Easy rate

I purchased a new policy with GEICO a few weeks ago but hadn’t downloaded the app on my phone for them to track telematics. I then just got this email after a few other prior ones requesting me to download the app that today was my last day to do so or I would lose my Drive Easy discount next month.

My question is, was I even required to have it in the first place? I fought claw and trove; calling multiple companies and filling out so many online quotes till I got this current policy. I have read horror stories regarding mileage tracking by insurance far before I even found myself in this scenario, and after this email I dug up the math and it would be a roughly $300/yr gain.

Is this something I can do, go ahead and have it cancel Drive Easy on its own?