Give me an education about this "PIRATE SHIP" method that has been discussed here.

Yes, yes, yes and yes.

Basically, you are using their commercial account. They charge you a small fee. Like minimal.

Make an account at pirateship.com. Box it up, weigh it, fill out the info on their site, print the label, tape it to your box, drop it off at a ups store and let it go. My local CVS accepts UPS drop offs as well. The last one I sent out, I knew I had a delivery coming in and left it outside with a large note "UPS please take" You will get the tracking number when you print the label.
So this is trustworthy?