When a community note gets posted, it will negatively impact the reach regardless how accurate it is. Even if it's corrected later, the damage is done already.
The note does not appear to everyone until enough sample rate it "high".
Also this works both ways. Pasting community notes on MSM fake news is incredibly useful and more than offsets any limited reach the other direction, because in the end truth always wins.
When a community note gets posted, it will negatively impact the reach regardless how accurate it is. Even if it's corrected later, the damage is done already.
The note does not appear to everyone until enough sample rate it "high".
Also this works both ways. Pasting community notes on MSM fake news is incredibly useful and more than offsets any limited reach the other direction, because in the end truth always wins.