Ask HN: What steps should we take before open sourcing our business?

Hi HN! I'm one of the founders of Instant 2FA (instant2fa.com), an easy way for developers to add 2FA support to any website or app in 30 minutes.

We're in private beta right now, but since it's such a security-critical product, from the beginning we've planned on open sourcing the entire business. With a little more than a month until we plan to launch and do that, we're starting to get all of our ducks in a line and are hoping the HN community can help us avoid making common mistakes!

My question for the HN community is this: if you run an open source business, what issues have you run into that we might? Are there any we should definitely do before we open source everything?