In 1983, the United States Toro company launched a project called "timely" ("S'No Risk program") snowplow promotional Plan: relative to the normal price promotions. In this program consumers need to spend more money to buy a snowplow, but if this year's snowfall is less than 20% of the historical average snowfall, he will be able to get a full refund. Initially there was a great success. But can be regarded as a kind of insurance? As consumers would participate in promotional programs to avoid risks? However, it seems that the marketing plan ...