I dislike these ideas: the perception of most readers is that more choices is better, but that's not strictly accurate.
Look at the top story on the site right now: 90% linear, just a few branches, each by a different author and themselves linear after that. If the number of branches were displayed a lot of readers would have ignored that story, but they weren't: so it stood out for it's ever increasing depth, which to my mind is more important. No matter how many branches you have per chapter: if 90% of them are placeholders or super short "Character Choices" chapters that you only developed three or four of, the story isn't worth reading.
Better to keep things to depth, rather than breadth: because breadth is to prone to abuse.
(However, I admit; this would be somewhat ameliorated by also including average thread depths, as this would encourage authors of those "custom order robot" stories, [and others with a lot of 'options' leading nowhere,] to flesh out more of the branches. A lot would also depend on how the "average" was decided. Total the depth of all non-continued chapters and divide by the number of such chapters? Chose the depth among such chapters which occurred most often? Find the difference between the highest and lowest such chapter number and divide in half? The one of these I think is best, [In terms of accuracy,] also puts the most strain on our server...)