Dumb move. This will only accelerate their disruption and ultimate demise.
This would only be a disruption if Apple remove the fitbit app from the app store. As it is, this should not affect fitbit sales in the least.
That said, it would be fun to speculate what would happen if Apple did remove the fitbit app from the App Store.
Would android sales go up because current and future fitbit users could no longer use iOS?
Would fitbit sales plummet because it no longer work in the iOS ecosystem?
Won't happen, but would be fun to watch if it did.