Let's say you are a "regular" user. You "pin" x number of pins/frequency (hr/day/whatever). This establishes a normal activity baseline. Filter by "pins" that have links that have affiliate codes in them. Now, it has been shown that Skimlinks can identify these links and replace them. If that is the case, they can count the number of affiliate unique id's in their system across pinterest accounts, thereby linking seemingly disparate accounts by their affiliate links. Unless this guy is running game with multiple affiliate links or affiliate links are uniquely generated on a per item basis then I think Pinterest can put a stop to this.