I really have to wonder where this outweighs the effects of the extra CO2 added to the atmosphere (article says it increases fuel usage by 2%, but that's likely to be an ideal case) in the long term.

CO2's problems aren't merely global warming. More CO2 also affects our brains and makes us tired, contributes to ocean acidification, and countless other things. This alone might not be enough to completely destroy the world, but as with anything, one industry finds a way to greenwash and then you have a snowballing effect of every company rushing to implement those same ideas and causing more harm than good. Producing more CO2 to prevent a tiny bit of sunlight/heat retention could be one of those things.