I currently use Billings Pro, but thats just because I haven't had time to replace it yet. Have/would you consider making it open source (no reason you can't s

I currently use Billings Pro, but thats just because I haven't had time to replace it yet. Have/would you consider making it open source (no reason you can't still charge for your hosted version)? I'd love to use something that already exists, but OSS is a must for me for a new tool.