Not sure about that. The major VPNs have similar (not identical) functionality and price. They're competing on the perception that they are more secure than oth

Not sure about that. The major VPNs have similar (not identical) functionality and price. They're competing on the perception that they are more secure than others. In that light, having a passing security audit by a reputable company would be table stakes for a lot of customers. As noted by another commenter already, not having one could also be a deal-breaker on a vendor security assessment by a big company, too.