On the third day of FYUZ, in a noticeably emptier theater, representatives from Aduna, Deutsche Telekom, Nokia, NTT Data, and Telefonica were very mildly grilled about the state of the Network API market. “The market size is a tough one to estimate,” said Deutsche Telekom’s Nathan Rader, VP Service and Capability Exposure. “Estimates range from nothing to $300 billion, but I think it is a bit like LTE. No one predicted the app ecosystem that 4G enabled, and it is still very, very, very early days for Network API. Of course, the challenge of developing it is that it only works at scale.” Aduna’s Claudiu Pasa, Chief Product and Technology Officer, agreed somewhat, saying “the market potential is huge, but…