Apparently they named it twinzer because it is exactly like every other action sports community.
Twinzer was created by two action sports enthusiasts. . . While the “X-games” sports participants will make up our largest segment of users we extend our community to Kiteboarders, Wakekiters, Wakeskaters, Snowmobilers and others who are not yet mainstream action sports. We see these as sports that will eventually capture the imagination of many and therefore have created a home for them.
Wakekiting, too? Cowagunga!