Dish Network has attempted to make up for this week’s CBS channel blackout, which saw the US broadcaster pull 28 local channels in 18 markets, by offering subscribers free antenna installation to access CBS channels on over the air (OTA) TV at no additional cost, or the option to drop local CBS channels from programming packages and save $10 on monthly TV bills. This is a major statement from Dish which has never been scared to take on additional costs and go it alone, a sentiment CBS probably echoes. Dish claims thousands of subscribers have already made the switch to OTA services, but a large proportion of its 13.2 million pay TV subscribers would rather pay the $10 extra than…