Overture has a responsibility to ensure its data consumers correctly attribute OpenStreetMap Contributors, and understand the legal liability they open themselves up to if they do not properly attribute.

I believe it’s the community’s role to debate what attribution norms it considers appropriate (subject to the license), and take this diary to be a spirited entry in that discourse. But with respect to this specific contention I do want to point you to section 4.8 of the ODbL. The whole thing is worth a read!