A barrage of more bad news for the traditional pay TV industry came out this week, as a new report found that the growth of global pay TV revenues slowed significantly last year, topped by losses in the US, which coincided with a major equities research firm dealing a blow to the cable industry by downgrading its valuation. The price of cable stocks has soared over the past few years, most of it justified, which has seen the value of cable smash through its ceiling of potential. Now it has finally leveled out, and will eventually have to make its dignified descent. The report from Digital TV Research found that North America hit its pay TV peak two years ago…