Your comments are on point and ones we've discussed internally. Big thanks for sharing them because it's super helpful to hear others pushback and express those same concerns.
Marketers already use different channels for different purposes - email, text, social - so we know introducing a new type of channel will definitely be a heavy lift.
However, we believe personalization at the expense of privacy has been out of hand and want to see control put back in the hands of users. My co-founder and I pioneered and have patents on tracking and personalization and feel we helped give birth to these problems. The Notifier is an idea we had to push the pendulum back towards user control. We'll give it a shot and see if the market feels the same way.