Gays have higher average income than the average of the total population, so advertisers increasingly like targeting them.
Because the dominant media is overwhelmingly leftist, they craft stories that exalt gay athletes/celebs/politicians. In fact, I can't recall seeing a single article from the MSM that has been critical of the LGBT movement. If I've missed one, please share it. Most of it reads like that atrocious Sun-Times puffpiece to which I linked.