Fitbit also has a privacy policy, as does Google. It’s not actually the practice to sell your data. It’s much more valuable for them to hold onto it and sell products that use your data.
The concern is that Fitbit was a product company. (Garmin is a product company. Apple is a product company. Etc.) Google has never seen themselves as a product company. They make a few products, certainly, but they're an ad company first and foremost to their shareholders, and a service company if anything else past that. Products are very low on the Google totem pole in terms of revenue or more critically ideals in how the company sees itself, and sells itself to its own investors.
(To add to the pile of anecdotes, I haven't yet stopped using my Fitbit because of the modern American dystopian need to appease the "Wellness company" that influences my Health Insurance pool and costs. But it's been heavily on my mind since the Google purchase and I will probably switch to something else whenever I free up enough gadget budget.)
(To add to the pile of anecdotes, I haven't yet stopped using my Fitbit because of the modern American dystopian need to appease the "Wellness company" that influences my Health Insurance pool and costs. But it's been heavily on my mind since the Google purchase and I will probably switch to something else whenever I free up enough gadget budget.)