SMI launches in Canada today By Greg O’Brien MOST PEOPLE BUYING or selling advertising will likely tell you a rate card is merely the beginning of a conversation – and what clients actually pay is sometimes far different than the published price. What ad buyers, and to a lesser extent, broadcasters, publishers and others, have long craved is a reliable way to figure out what ads truly cost in the market and beginning this month, they’ll be able to know that with Standard Media Index coming to Canada.