That still excludes any of their external marketing costs.

It also may not include any taxes owed. That's just as orthogonal to how much Teespring has paid out, which is the entirety of their claim.

Right. That's why they should just say "paid out a million" (a statement of income) rather than "became millionaires" (a statement of net worth.)

Would be interesting to know who these sellers are. Are you allowed to disclose it?