I briefly worked for a company who worked on household power technology. Their product would attempt to predict energy prices, weather patterns, and usage to sell your excess energy at peak prices. Like discussed in the article, this company collected usage data and controlled the sale of energy back to the grid centrally. They did this because it meant they could better train their prediction models and run them on more powerful hardware. The controllers would have needed internet connectivity anyway to query energy prices, and putting the prediction on device would have just made them more expensive and worse. Even when I worked there (back in 2015 I think), they were already very aware of the threat vectors discussed by this article and took some measures to prevent it.

In my opinion they were (/are, still exist) a responsible company run by competent people. They did not collect the data out of “greed”, and I strongly suspect that the people in these comments implying that the data is collected to be sold have never actually worked in the industry and have very little idea of the specific value of energy usage data. I can’t really speak authoritatively for other companies, but I would guess that, like the one I worked for, their products are internet connected simply because it improves the product. For example, people expect things to be controllable or viewable from an app from anywhere, and that requires internet connectivity.