Most WCA-recognized competitions in the US are run independently by local organizers with no involvement from CubingUSA.
CubingUSA Supported Competitions are an optional way for US organizers to run a competition under the auspices of CubingUSA, which means that all finances fall under the domain of CubingUSA.
Organizers: If you're interested in running a CubingUSA Supported Competition, please see the Supported Competitions Process page to get started.