Is it in a web context that you have implemented Recommendations? If so, have you already tried the debugger tools to see what is being evaluated in terms of algorithms, entities etc

If you're creating/saving Analysis Workspace projects, they should only be available to the people that you have shared them with. So it wouldn't be exactly as you're asking for, because the Folder would be visible to all users, but the Workspaces within that folder could then be specifically shared...

Yes, with XT activities the audience qualification is re-evaluated every time a request is sent to Target. It won't kick them out of the test from a reporting point of view but they would no longer see the test content

Assuming you see the request being made to Target and a response being returned with offer content, the most likely cause is that the HTML structure of the page has changed and your CSS Selector no longer exists. You can check if this is the case as follows:i) If you're using the Visual Editor, you ...

Yes, so you're right, overall Visits & Exits will be the same; however, if you breakdown your Target Activity/Experience by something like Page, then you will see the individual exit rates e.g. 

I agree but I'd suggest raising this with Customer Care because it's not a known issue where Web SDK+CNAME causes this problem

Can you share what you see right at the bottom of the debug window? In particular, it will be interesting to see what the response.status.code value is (i.e., is it "OK" or is it "NO_CONTENT"); and then if the code is "OK" and response.content is populated, what do you see returned there? (i.e., do ...

It sounds like you're using conversion optimization as your optimization goal, can you confirm that? Just want to rule out the problem being that Personalization Insights is only available for conversion optimization goal activities

In case you haven't seen it, this article might be helpful to work through

The answer here might also be an option for you, and should be relatively straightforward assuming your environment allows for Chrome/Firefox extensions