[thecatspaw]

opening up publishes all your vulnerabilities, bugs, hacks and swearwords in the code as well. Thats plenty of reasons to not go open source

[Operyl]

Security by obscurity really isn’t a great place to stay on long term. There is also an entire backend to this. I can only see great positives long term here, even if it means someone nefarious finds a bug in the short term.

[onion2k]

Those are reasons to open the code up. You'll be motivated to improve it.