@vincent FWIW: threads are implemented in BirdsiteLIVE and it looks like a lot of it could be reused. (though the two code bases have diverged quite a bit)
https://github.com/NicolasConstant/BirdsiteLive/blob/8897b8838d7d56c6a88032dc582f5a15ba790448/src/BirdsiteLive.Twitter/Extractors/TweetExtractor.cs#L29 (the equivalent in bird.makeup is setting this property always to false )