Classic example of an article in search of a movement. Take a handful of tweets that share an opinion and write an article that makes it seem like there's a mass exodus. It's ok, you don't need anything more than a handful of tweets to back your claim. Yes, some people are privacy conscious and are going to stop using Fitbit but how many are actually doing it? A lot? A few? Who knows. I'm sure author has no clue but…
What is wrong with using Twitter as a source? This is how people communicate in 2019 What method would serve you better?
This is how a certain demographic communicates in 2019. Twitter does not represent society as a whole.