This sounds like the matching Intuit has described in its test utilizing data aggregation and analysis so small businesses can get loans. The approach lends itself to transaction-based revenue and could help Intuit avoid endorsing third parties. Its exhibitor line up for this week's QuickBooks Connect shows many competing companies, such as several that have invoicing applications. Does Intuit simply let vendors tie in for a per-transaction fee and keep them all happy? Its premium sponsor list has some companies that rely heavily on transactions—Avalara, American Express, Visa and Facebook and LinkedIn with their ad model. (You'd have to guess AmEx is there also because of its involvement in the new Refund Transfer program on the tax side.)