Thank you for taking the time and going to the trouble to help me. However, it seems that our respective “wavelengths” about this are too different for us to be able to efficiently converse about it.
My position is that Cloud9 should make it extremely easy for a person to reinitialize his account. That would eliminate a lot of jiggery and pokery for everyone concerned. And it would be a trivial option for Cloud9 to provide. That said, I would like to point out that while I AM new to Cloud9, Ruby and Rails, I have (as recently as yesterday) successfully accomplished the setting up of a development environment on a physical machine (OS X), using RVM, bundler, etc. So can now more easily follow points about entries in Gemfile, etc. Even so, I have no interest in doing anything that will result in having my private account become public in any way.
So if there is no way for me to refresh my Cloud9 account in such a way as to maintain its privacy, I will simply create a new one using a different e-mail address. If doing something as silly as that is necessary because Cloud9 doesn’t offer a way to reinitialize an account, then so be it. I have zero interest in paying Cloud9 for unlimited private accounts, nor for anything else. I simply want to avail myself of the offered free-tier Cloud9 IDE in order to easily follow Michel Hartl’s Ruby on Rails Tutorial.