This isn't about MSRP but OSPR (Ordinary Selling Price Representation).
I know the linked article mentions MSRP but the quote they have:
“The Bureau’s investigation concluded that these claims created the impression that prices for items offered on www.amazon.ca were lower than prevailing market prices,” Canada’s Competition Bureau said in a statement. “The Bureau determined that Amazon relied on its suppliers to provide list prices without verifying that those prices were accurate.”
only mentions “prices for items offered on www.amazon.ca were lower than prevailing market prices,”
"Prevailing market prices" are not MSRP.