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Not disclosing this modification is putting individual stores at a disadvantage when they and their customers are putting in the work of adding pins.I find it hard to sympathize for the trivial "work of adding pins" when it's Pinterest that created the universe in which those pins even exist and the community that gives them value.
> One specific, problematic issue is that when individual online stores pin their own content, it is unlikely they would insert an affiliate code. But if the store has an affiliate program, it is highly likely that those links now will have an affiliate code in them that gives Pinterest a percentage of any sales.
It's also hard to sympthasize with online stores having to cough up some money for marketing directly to Pinterest's community.