Verified answer

if you are getting paid it's considered a job. You are an independent contractor. I's no different than if you were booked on a modeilng job or on a film. If the site is operating legally, they will need all of your personal details and Social Security number before they will sign you up, and your income will be reported to the IRS

If you were to do it on your own, not through a webcam site, you could probably get away with it as I doubt anyone would audit you. Your chances of being caught would be very low