The issue with this argument is that they aren't rebroadcasting, they're just directing the signal as a slingbox would. There is exactly one end user unit (could be a person or a household) of the information, and it is not being made publicly available. If I set up a slingbox in my livingroom, it is legal to use that slingbox to consume the signal on another of my devices. What if I set up a slingbox on a roof in Brooklyn and streamed the content to my house in Texas? The only difference between these scenarios is geography. What I see here is the case of a company saying, "Instead of having you own the antenna in Brooklyn, we'll set up the antenna and the tunnel for you, and you can consume it how you wish."

Adversely affect the actual output? Sure. The problem isn't the effectiveness of the output, though, it's the output itself. This may sound ridiculous, but we get enough sunlight that most parts of Earth could positively contribute, especially if much of that land is not biome-valuable. In the cases of Alaska, Texas and the Mojave, we have incredible potential for output, with little-to-no biome detriment.