Web fiction
Advance chapters
The serial monetization pattern: patrons read a buffer of chapters ahead of the free release.
Advance chapters are the dominant monetization pattern in serialized fiction, typically via Patreon: paying readers get access to a buffer of chapters sitting ahead of the free release, with buffers ranging from a handful of chapters to fifty.
The pattern has a craft footprint worth knowing even if you never use it: it structurally pushes writers toward a fixed, sustainable per-chapter word count and a kept schedule, because the buffer only exists if production outpaces publication. See choosing a release schedule.