Glad the screening questions could work for you. You could even offer something like a bunch of sats on sign-up or a sliding scale for completing each Q. Since the value of your users grows if you’re able to segment them further.
I know that goes against the vibe of bitcoiners, but general age bands, interests, locations etc is not too intrusive and should help you scale the product and make it far more commercially valuable imho.
As a company/creative you will also certainly want to select all the variations the user sees, not be randomly compared against other entries. Especially if you can accommodate more than 2 variations.
Anyway, I’m sure I’ll come up with a few more avenues. Congrats again, keep us updated