I'm referring specifically to the fact that there hasn't even been an attempted 3rd pickoff yet all season. Because the effect is a failed pickoff attempt is a stolen base, baiting the 3rd pickoff will go off the same analytics as stealing bases: you want to get thrown out on the 3rd pickoff attempt up to a maximum of 20% of the time, because the other 80% is free 2nd base. The most analytically-minded teams are going to be drawing pickoff attempts with this in mind. And even if they don't throw the ball on the 80/20 pickoff rate, that means that the steal rate with such a large rate will be much higher.
But both teams know this, so the pitcher is much more likely to throw a fastball if he opts out of throwing the 80/20 pickoff attempt. The batter knows that he's much more likely to throw a fastball, which means he can be read for it to make good contact.
And these are all things that the smartest teams will be taking into account and making use of, and scoring quite a lot of runs off of.
In a couple of years, pickoff success will be a much more important pitcher stat than it is now, since you'll really start to see more of those 80/20 pickoff attempts once the teams and analytics departments get used to the rule and its consequences.