Which part isn't true? The miners and many companies were quite explicit about their conditional support for Segwit with the New York Agreement. This is not a surprise move for anyone following the scaling debate.
All of these companies already supported segwit before that. This whole show was for pleasing Bitmain, who were blocking segwit for nearly a year. The companies couldn't care less about doing an hardfork to double the capacity again after segwit, they just caved in to Bitmain's demands.