Why would a UK-based pay TV operator with a serious OTT video business of its own willingly embrace distribution and set top integration deals with US SVoD heavyweights, only to turn its nose up at an approach by a homegrown streaming service with a more than credible resume? That is the burning question following reports this week that Sky has gone off the idea of a distribution deal with Britbox, the joint video streaming venture from broadcasters the BBC and ITV. Sky’s reasoning, according to the Sunday Times, boils down to Britbox not offering any significant additional value to its subscriber base. But what about all this talk about pay TV operators evolving into super aggregators? Doesn’t Sky…