I've done both, 2-apps to unlock and 1-app to unlock. I'm currently doing 1-app to unlock cuz I'm redirecting them to some place else. I've had an average CR of 35% with 2-apps to unlock so it's good and extra revenue.
You don't require a site. Just specify you'll be using Instagram to drive traffic. I've already spoken to Ben(OGads' owner) about it. They'll allow people who put Instagram on their applications.
Same revenue for now. I'm trying to scale up with my Aged accounts but they all require Email Verificaitons but I'm not receiving codes. Been trying for a week now. I'll try for 2-3 days more and if still nothing, I'll just buy a few aged accounts from somewhere.