Might be little late for such remarks, but first 3 questions are horribly unclear.
“Have you ever owned DAI, but never created it through providing collateral?”
I undestand intention was to distinguist those who ever used CDP from those who owned DAI only by buying it. But what with people who did neither or did both?
this shoud be decoupled into three questions I believe
“Have You ever owned DAI?”
“Have You ever borrowed DAI (by CDP or secondary lending platform)?”
“Have You ever bought DAI?”
Correct me if I’m wrong but question
Do you currently own or have you ever bought crypto currency?
Could be simplified to:
Have you ever own cryptocurrency?
Unless You want to specifically exclude people who has been given cryptocurrency (not bought it) and had lost it
And last question
“Do you currently have DAI that you created or have you ever created DAI by depositing collateral?”
I believe is little more clear asked this way:
“Do You currently have any opened DAI loan (by CDP or secondary lending platform)?”
Hope this will help