Why can't I add Heroku Connect danketsu or paid plan?
It is not possible to provision the paid plan (
danketsu) directly. Instead, one should provision the
$ heroku addons:create herokuconnect:demo
demo plan will be upgraded automatically to the paid plan only after you have accessed the Heroku Connect dashboard for the first time via the 'addons:open' CLI command.
$ heroku addons:open herokuconnect
If it doesn't automatically upgrade, ensure your application belongs to a Heroku Organization that has the Connect entitlement.