Fictional Fans

Okay, this is a SUPER interesting thing to model summaries on. Because jokes have a bit of a formalized structure, too - see comedian Jimmy Carr:

The release of tension in jokes. If you think all jokes work in exactly the same way, it’s two stories. In the first story, you force the audience to make an assumption that turns out to be erroneous. The second part of the story it’s the sudden revelation of a previously concealed fact that they’re working that way.

The best kind of fic experience is one where the summary draws you in with an interesting premise and a demonstration of writing skill, and then takes you on a roller coaster ride, right? That's why we're willing to read ten thousand h/c or bed-sharing or huddle-for-warmth or A/B/O fics because every writer gives you a different take on each trope. Maybe good summaries aren't exactly like jokes in that there's not as much of a requirement for an explicit twist, but the audience is still looking to be entertained and surprised.