To “opt-in” or “opt-out”, that is the question

Over the past few months, you may have received various e-mails from business entities claiming that you indicated that you would like to receive information from such business, OR that you are a previous customer and as such could receive the electronic marketing.
You would have further been informed that should you wish not to receive such e-mails, you can “unsubscribe” or use the “opt-out” function.