Re: Pfft
No one that cared about security would want to use a product without commercial support.
Few would want to support a large user base in a company for a software product without commercial support because it is a nightmare if it suddenly breaks or something. But that doesn't say anything at all about its security, just its usability.
But perhaps if someone really cares about security above all else, they would not consider using a closed source product, for exactly the same reasons for not using a secret proprietary encryption algorithm.