Here's the thing: you are no longer working in open source. If that's right for your product and your company, then so be it, I wish you success. FSL is an interesting development in this space. But, you opted out. You did give up on open source. Okay, fair enough, but to square your conscience I think you need to acknowledge that.
If you want to chat a bit more about the problems of open source and commercialization, share your insights from Sentry, and hear some thoughts from someone who might have done differently, feel free to send me an email, sir@cmpwn.com. Would be interested in talking about it with you further.