> Twitter has several Candidate Sources that we use to retrieve recent and relevant Tweets for a user. For each request, we attempt to extract the best 1500 Tweets from a pool of hundreds of millions through these sources. We find candidates from people you follow (In-Network) and from people you don’t follow (Out-of-Network).

> Today, the For You timeline consists of 50% In-Network Tweets and 50% Out-of-Network Tweets on average, though this may vary from user to user.

It would’ve been interesting to see what changes were made since Musk’s takeover. As someone who followed 5,000+ users, I know I never saw a tweet that wasn’t either from nor retweeted by someone I followed — e.g. I never saw those “[user you follow] liked [someone you don’t follow] tweet”

50%/50% in FYP seems to reflect my experience today — which is much worse, to the point that I’ll regularly switch to viewing by List b/c I miss seeing people who I want to read.

I wonder how much testing and analysis went into deciding on the 50/50 ratio — e.g. how does it impact user engagement and behavior. Because it sounds like an easy round value that you’d land on when thinking “users should be pushed out of their bubbles”