Then there's the whole 'we never keep logs' claim which can't be proven. So, caveat emptor folks!
It can be trusted with a fair degree of certainty depending on the company. For instance, we know that PIA at the very least was willing to testify under oath that they had no records to provide the US government. Could they be keeping secret logs or have changed practices since? Sure, but at some point the claim seems credible.Now those flavor-of-the-month budget VPNs that cannot possibly be profitable unless you're the product? Different story.