Why are you saying this? There is literally no mention of social media in this article. The data (at least from the original project) is mined from publicly available data, which could be social media data, but that data has to be made public in the first place.
It is possible that the "Research Grade" version of the program does use that data, but there is no evidence of that here.
It is possible that the "Research Grade" version of the program does use that data, but there is no evidence of that here.