How does Twitter decide which liked Tweets get the “stochastic retweet” behaviour?

As mentioned here, sometimes we see other people’s likes in our Twitter feeds. Some have semi-jokingly characterized the treatment of liking Tweets as “stochastic retweets”.

I was wondering, are the specifics of this behaviour documented anywhere?

Obviously Twitter doesn’t put every single liked Tweet in our follower’s feeds (otherwise they’d be overrun with liked Tweets). Is there any criteria that Twitter uses to determine which of the Tweets you liked gets pushed onto your follower’s feeds? Is there a certain ratio of your liked Tweets that it puts into your followers’ feeds? Does it do it indiscriminately to your followers, or does it take the engagement patterns of your followers into account? e.g. if a Tweet you liked appears in one of your follower’s feeds, does it necessarily appear in all of your follower’s feeds?

Suppose you make a Tweet and another person with n followers likes the Tweet. Can we make any inferences about how many additional people that Tweet might be exposed to because of that like?

Or is this all Twitter Algorithmâ„¢ black box magic?