Microsoft [1][2] and Google [0]have been doing this for years. Google's billion word language model dataset is a notable example which was central to a lot of important research.

[0] https://research.google.com/pubs/pub41880.html [1] https://www.microsoft.com/en-us/research/project/mslr/ [2] https://www.microsoft.com/en-us/research/project/microsoft-3...