Comment by falseAss

Interest based text recommendation is actually a proved idea in Chinese world, e.g. Toutiao as a personalized news aggregation app (https://techcrunch.com/2019/10/21/is-there-room-for-a-u-s-eq...), and Zhihu (a Chinese version of Quora)

Both apps are quite mainstream & huge DAU versus their English counterparts. The delta ingredient is likely alg.