After doing some research I agree with Cerino above "Not much to see here..."
Look at the logos and text at the bottom of the tournament image...
The people in the Invitational work for those companies not WGT. Companies like HavasMedia, razorfish, etc provide media planning and buying for their clients. They place ads for their clients. Lets say GolfNow, as an example, has a national ad campaign to run on TV, radio, in print and on the web. Lets say GolfNow contracts with HavasMedia for example to plan and implement the campaign. HM works with WGT to implement the GolfNow sponsored tournament as part of the national GolfNow campaign.
This tournament was about the WGT NYC office building relationships with people in other companies who can and do supply advertising/sponsorship income to WGT. NYC (Madison Avenue) is a huge center for advertising.
I figure WGT setup the user accounts for all the players. One of the people already had an account so they played on a 2nd with WGT's blessing.
Its just common business practice to build relationships.