Why not publish the code (or some parts)? You could increase the trust in your service.
I'll use it next time I need to register somewhere.
I'll see for the source code, it is something which I've been thinking. I may eventually push it to github but I've not yet made my mind over this.
The code desn't have to perfect. Just to add some content about free software in your site.
Tweeter might help you too.
I'll see for the source code, it is something which I've been thinking. I may eventually push it to github but I've not yet made my mind over this.