There's another option that CBS counts in the eyeball department.
(And I have verified this with the CBS app folks,)
I dropped my cable service at the end of the year and switched to using just streaming services. My plan has been that I would add CBS AllAccess once TAR returned and not until then. I had planned with the original April premiere date to sign up in early April, in time it to when I get direct deposits each month, but then CBS did this last minute schedule change.
With the one week free trial for the lower cost ($6.99/month) that isn't commercial free, they won't bill you for the first month until your free week expires (and exactly one full week.) So I will sign up probably on Wednesday do I'm not billed before I have the direct deposit in my bank, and I will be able to watch the premiere live and will be able to rewatch thereafter.
CBS makes clear that these views ARE included in the Nielsen numbers. For those of you outside the U.S., sorry the app is for US viewers only, since the app can restrict to U.S. viewers based on IP and your provided bankcard number.
But that is another way to make sure your viewing counts!
And what I'm spending now with streaming without cable is half of what I was spending on cable!