Social syuzhet study

Definitions: [link], or TL;DR: Fabula is the linear timeline of events in the story's universe. Syuzhet is the not necessarily linear timeline of events presented to the reader. The movie Memento is a great example of disconnected fabula and syuzhet used to great effect.

For the purpose of studying the use of syuzhet in human-written novels for application to fiction generation, I would like to be able to have graphs (like the one in the Wikipedia article) of fabula as a function of syuzhet or vice versa for a great many well-known novels. However, I imagine it would be very tedious to do this (reading very slowly while taking copious notes about what moments in the story's timeline are described on which pages), so I propose to do it by crowdsourcing.

Imagine an ebook reader app where everyone reading a given book has access to shared fabula and syuzhet timelines, and can easily make a note of a correlation between the two at any point while they're reading the book. The timelines show points other readers have already connected, so each reader can do just a few to fill in a few gaps and confirm existing connections. That means each reader only has to do a few per book, so it's not onerous.

How to convince the readers to do this? Give them credit toward future book purchases for each connection they make that's corroborated by other readers.