I had a similar banner on my page, wanting me to opt in.

This was despite a survey I did stating quite plainly that this is something doomed for failure.

As said by many others, no-one can guarantee delivery from point A to Point B.

My point has always been, if I can't get a letter with a priority stamp from one end of town to the other end (regional town, population 40',000), then no way will a parcel leave my post office and arrive in a remote area of WA or QLD. Or anywhere else for that matter.

A delusional idea at it's worst.