WildWeazel
Carthago Creanda Est
Mount & Blade is an example of a privately made retail game. It's available for download from the game's website as a demo, and you can buy a product key to unlock the full game. Since it's available on the internet only, the only "publishing" cost is hosting the website, yet it's available practically worldwide. So it can and has been done. And given the number of people who payed to play an early beta version of M&B, I don't think charging money for SSS would be unreasonable.
(And no, I'm not saying that because I may be joining the team!
)
(And no, I'm not saying that because I may be joining the team!
![Stick Out Tongue :p :p](https://civfanatics-data.community.forum/assets/smilies/tongue.gif)