Publisher MAP/MSRP enforcement (Marvel, DC, Image), how strict is it?

Comic-book publishers run MAP (Minimum Advertised Price) and MSRP policies, but enforcement varies sharply:

• Marvel, MSRP printed on the cover (e.g. $3.99, $4.99, $5.99). MAP is not formally enforced for back issues; new-release discounting up to 20-30% is common. Subscription bundle discounts (DCBS up to 50%) operate outside MAP because they are subscription-only.
• DC, similar to Marvel. Since the 2020 distribution shift to Lunar, DC has been more permissive on discounting. The cover price is the MSRP; aggressive discounting on TPBs is normal.
• Image, Dark Horse, IDW, publisher MAP is essentially nonexistent. LCS owners discount freely on indie titles.
• Manga (Viz, Kodansha, Yen Press), Viz enforces MAP more strictly than US publishers, especially on flagship series (One Piece, My Hero Academia). Aggressive discounting can trigger account review.

The Magento implementation: a customer-group-aware price-rule engine that respects publisher MAP for guest visitors (advertised price ≥ MAP) but allows tier-pricing below MAP for logged-in subscribers (subscription-only discount, not advertised). Mirrors the DCBS pattern and stays compliant with publisher account terms.