Absolutely - adding money doesn't automatically result in trustworthiness. What it does do, however, is make the transaction fall under legal commerce, which gives the purchaser/user rights and remedies that they do not have with free (as in cost) software.

With foundations or any other form of over-arching bureaucracy, you risk stultifying software developers and harming innovation. It's really, really hard to beat the self-organizing aspects of free markets combined with commercial legal frameworks.