[2024] What is the logic behind the campaign pricing?

Based on the steam page, it seems like the campaign is priced around 10$ per three missions. I have seen a playthrough of the first three missions. Especially mission three has me excited to play once the game becomes free, but I do not understand why the price is so high. I can think of several games I could play right now with more content than Stormgate that are also much cheaper per mission. Starship Troopers: Terran Command for example, sells their expansions of nine missions for only slightly more than 10$.

In addition, if I want the finished story that is going to be extremely expensive. Other blizzard campaigns are something like 15-24 missions long. Meaning that I would be spending 50 to 80$ for a full campaign. That is potentially more than a full length novel from my favourite author. In terms of video games, at this point we are not only cpmpeting with established RTS brands but also stuff like Elden Ring.

So help me understand: Why are these missions priced so high? Am I missing something important?