The World Cup has to be the answer to that question, as it is the only event that draws several pages of RP per day (during Qualifying) and about a page of RP per day (for the Finals group stage). Hosting a WCC event means reading alot of RPs (and often better quality RPs than you'd see in other events). Hosting an Olympics means scorinating alot of events simultaneously. Based on that, I'd say the Olympics is the most prestigious and most difficult event to host but a World Cup title is the most prestigious prize in NS Sports.