JioStar, ET BureauSurrender of around 50 licences in three years signals rising stress in linear TVSeparately, Culver Max Entertainment, which operates as Sony Pictures Networks India, surrendered 26 downlinking permissions after receiving MIB approval to uplink and downlink the same set of channels, data showed.The licence surrenders are due to strategic restructuring, financial unviability and changing market conditions, industry executives said.Live EventsIndia's pay-tv ecosystem has been under sustaine ...