Maybe something more comprehendable would be “free as in Postfix, not Gmail” in that anyone can freely implement an MTA or use existing FOSS, which is different

Maybe something more comprehendable would be “free as in Postfix, not Gmail” in that anyone can freely implement an MTA or use existing FOSS, which is different from using for free Gmail, Facebook, first 3 months of AOL, first 10 albums from Columbia House, … https://www.mentalfloss.com/article/28036/its-steal-how-columbia-house-made-money-giving-away-music https://www.mentalfloss.com/article/28036/its-steal-how-colu...