Caveat before anyone answers: I am asking about architecture, not about a specific service, and I would rather nobody named one.
When I started doing this the whole decision sat at the lander. Reviewer sees a compliant page, real traffic gets the other one, everything downstream is unprotected because nobody was looking downstream.
That has clearly stopped being true. 1) Two accounts of mine died in March where the lander was untouched and clean and the only thing that changed was the offer page the advertiser was hosting. 2) A third got a warning citing a page I do not own and cannot edit.
So the question is where people are drawing the line now. Is it still the lander, has it moved to the hop after it, or are people doing both and eating the latency? And if it has moved, what do you do about a page you do not control?