This currently runs only on your local machine. We do have a cloud version coming soon, but running your bots this way will be optional.
Yes, the code only is stored, not the data it processes. We could encrypt them so we can't read, but it would prevent us updating your scripts in future for new versions of axiom.
It does mean we could run your code, but this is not something we do, unless you want us to run your script in our cloud.
UI.Vision and long-established macro-recorders like iMacros target developers; this is a complete no-code approach.
Our tool is primarily built for non-technical people. We also have and are building up a bot sharing system (i.e. templated bot app store). It will be subject to manual vetting for quite a while.