When will it launch?
Short answer
When enough people on both sides have signed up to make the introductions worth making. If that never happens, it will not launch, and everyone who signed up will get an email saying so.
The longer version
This question comes up inside a longer piece on the same problem. If the short answer above raised more questions than it settled, the full article has the reasoning behind it.
What Push & Pitch Is, And Why It Might Not Exist