Does not currently affect search results. If you are adding a new category to a venue and you want to make it primary, you should just use primaryCategoryId. In the case you choose to put params inside your resource string, when the node is called you need to pass an Object on the payload with the value for each param. Defaults to 20, max of On Foursquare, the city badges all include a list of venues you need to go - hit five and you get the badge!
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