While this might be true, blender is not used in their productions in significant capacity. We worked on Fortnite among other things for 5 years and its just not used.The pipeline is software agnostic on the modelling part. The occasional freelancer does use blender, but as the animation pipeline is based on maya, that is…
The above mentioned companies like to publicly support blender because it's free and there's no barrier to entry. With the exception of epic's fortnite team (who outsource most of their artwork) none of them run an art production pipeline as a major part of their business and in the case of epic especially they profit…