We have pages on our site which we consider as "product view" in case of being visited by a user. Those pages may send not only one "global" mbox requests, they can also send several "not global" mbox requests related to AEM target components included on the page. All mbox requests utilize the same "targetPageParams" function returning entity.id and entity.categoryId values.
Now the question:
If a page sends, for example, 3 mbox requests having the same entity.* values, will this fact be treated by Target as if a user has viewed this product page 3 times ?
Yes, each request that contains an entity.id will be understood by Recommendations as a view. Are you using the targetPageParams() or the targetPageParamsAll()? One only applies the global mbox request (or pageLoad request). The "all" version should apply to any request from the page including later getOffers(), or trackEvent() requests. So if you only want the entity.id, entity.categories to get passed on the global request consider moving them to the targetPageParams instead of the targetPageParamsAll.