It doesn't deliver for the company. Opt in telemetry is the same as not doing telemetry. Not because people are morally against telemetry but most people just click through. You might say that is a good thing or that is how it should be but that is exactly why it doesn't deliver the desired result for the company.

I wrote more about the consent aspect here: https://news.ycombinator.com/item?id=35706897

tl;dr If we roll this out to customers, we'll be asking for consent, and won't be collecting telemetry data unless we have it.

-Ben, 1Password