How about open-sourcing your product before worrying about improving other products? SpiderOak has been "investigating a number of licensing options, and do expect to make the SpiderOak client code open source in the not-distant future" for a very, very long time now. It's no trivial thing to have a closed source client for a "zero knowledge" service.

https://spideroak.com/faq/why-isnt-spideroak-open-source-yet...

EDIT: I'd welcome discussion, in addition to your up/down votes