Description - Using Target recommendation API, you can search catalog using API. The MAX number of search results returned by API is 500.
Why is this feature important to you - Many Organization has millions of offers as part of catalog. Searching only 500 limits on lots of functionality.
How would you like the feature to work - This should be increased to a decent limit (like - 10000). The default can be 10 which is as of today.
Current Behaviour - You can't get more than 500 entries from the search.