Bluesky pioneered a brilliant solution to this “empty feed problem” in 2024, with the introduction of “Starter Packs”, a feature that allows users to curate and share their own collections of recommended accounts.
Bluesky pioneered, eh? I distinctly remember using a feature called "circles" on Google+ back in 2011. It allowed people to create arbitrary "circles" of people, share them and have others bulk-follow/unfollow the people from a circle. It worked incredibly well and Google+ became a lively social network even with its small userbase at the time.