The GetPopularSets method retrieves most popular photosets (galleries or collections).
PhotoSet GetPopularSets( PhotoSetType type, int offset, int limit )
An array of most popular photosets in the specified range.
The GetPopularSets method retrieves a portion of all photosets sorted by the number of visitors in descending order. Calling this method with offset set to zero retrieves the most popular photosets.
The information returned by this method is subject to access control. The method will only return photosets accessible to the current user.