The approximately 30 targeted players are the obvious victims in this case.
But there is a potentially wider issue.
If an attacker can remotely view the screen of a compromised player while that player is involved in a real-money game, the information could potentially be used against the other players at the table.
Those opponents don't need to have the compromised software installed. They don't need to know anything unusual is happening.
They only need to be sitting across the table from the affected account.
There is currently no complete public list of affected games or hands, so it is impossible to determine how many other players may have been exposed or whether specific accounts actually used stolen hole-card information.
That distinction matters.
What has been uncovered is a potential security threat created by compromised third-party poker software, rather than evidence that every player using external tools is cheating.