As far as I can tell, there isn't any way to embed playground snippets like Github's gist.
The idea is having something similar to present/godoc, but that could
be copy&pastable straight from play.golang.org - and not start a new
service, thus the UA notification in golang-dev is not necessary. So
essentially, I am advocating updating
https://go.googlesource.com/playground
Yes, You expressed in better words what I wanted.
Ok. Working on it then.