I did find the article more enlightening than the source code. I always suspected the quality of a tweet did not factor in to its promotion, only its engagement, and now they have confirmed this to be the case. Now I understand better why twitter seems to be filled with people angrily retweeting what I consider to be low quality clickbait tweets.
As long as they don’t try to tackle tweet quality at all separately from engagement twitter will remain unappealing to me.