Some eBay sites may select a few categories and designate them as "value categories". These are typically selected from categories where buyers can find great deals. (Not all categories with great deals are designated as value categories.) This designation can change over time.
While a category is designated as a value category (i.e., when ValueCategory is true), it is subject to the following rule: Items in value categories can only be listed in one category.
For example, if you attempt to list in two categories and the PrimaryCategory or SecondaryCategory is a value category, then eBay drops the SecondaryCategory and lists the item in the PrimaryCategory only. Similarly, if you attempt to add a secondary category to an existing listing, or you change the category for an existing listing, and if the primary or secondary category is a value category, then eBay drops the secondary category.
Only returned when this value (or this category's setting) overrides the value inherited from the category's parent.
See the Field Index
to learn which calls use ValueCategory.