The problem is that once a technique like this becomes standardized the cheat software will know how to automatically disable it. Even in the article it points out that had the cheaters put in the work they could have edited a single text file to break the system, but they did not. If this solution had been implemented for all CS:GO players then it would have been defeated fairly quickly, but since it was just one set of servers those were easy enough for the cheaters to avoid.
That said, eyeballing the chart in the article you can see an enormous ban wave that happens when the system is turned on, but afterwards the total level of cheating quickly returns to roughly where it started. If there were long term impacts it was only in the reduction of staff hours needed to review game footage to determine if a player is cheating.