Enrichment speakers don't earn the cruise line money. They are there to help the traveller enjoy the cruise - my area is destination enrichment so I provide behind the scenes information for port visits, but don't actually sell the shore excursions - Royal Caribbean in South Pacific/Australia/NZ last season left the destination work to their Shore Excursion team who had a presentation focussed on the contents of the shore excursions, rather than the features to see.