Every figure is what the brand itself publishes. Where it does not publish a value, the cell says so instead of guessing. Links marked Visit go through this site so we can count clicks.
16 programs in this directory, checked against each brand's own pages in September 2026. The list only counts programs that are open, paused or invite only.
The median is 38 days among the 8 programs that publish one. The longest: Grammarly (90 days), MarketerHire (90 days) and Mindtrip.ai (90 days).
The most common: In-house (6), Impact (3) and PartnerStack (2).