Ebay made me give them my SS number because I sold over $600 but not as a single transaction. It was used odds and ends(one-off transactions) that totaled up to over $600. My paypal account is a business account and has been for years. Might be the difference.
Gentlemen, your choices are to pay standard income taxes on these amounts, or to wait until one of those new, shiny IRS agents wants to meet you. At that point, you can explain why you think this doesn’t apply.
Let’s be real. Are you going to risk having your finances fully examined when the taxman wants an additional $100 or two?