Their (audited) accounts make no mention of other income sources within the company (there is only one company, so the term "parent" doesn't apply). Indeed, they give the clear impression that their turnover and profit comes ONLY from the tcb website. If there is a significant proportion of turnover generated from elsewhere, then their accounts are misleading. But I suspect they are just embarrassed by public discussion of the figures, and are trying to deflect criticism. Someone might want to ask what these 'other sources' are and what % of turnover they account for
P.S. (I assume you're referring to tcb, though the same response would apply to quidco)