I was going to make a bunch of smart ass replies until I read the article.
But for real, how do we get a freaking 1km balloon of nitrogen-oxygen there? And even if it's rich in minerals GL getting it off the surface, if we an even really get down there in the first place.
There is a game "Space Engineers" (that unfortunately doesn't have the most realistic physics ever

) and I had a mod that put a (mostly) to scale Venus with the actual map data from NASA, just with height amplified for playability (since the max planet size in the game is 120km diameter) and dear satan it is freaky and hellish. It even simulates the acidic atmosphere and to a degree the heat, and at least cosmetically, the weather. Fun to fly around on though but extremely dangerous.
I'm just imagining what kind of challenges getting any resources outside of the clouds would be, or how these societies would sustain themselves. At least mars has soil and the surface could be mined fairly straight forwardly. Some might argue to not do this though so that the planets could be studied, and I'd agree that any colonization should be done carefully in areas of no scientific value and not excessively so, so there are still areas of interest to study.