To attract clients with least cost to the USA and Europe, most travel agencies in Singapore practises a marketing tactic - the optional tours to places of interest. Otherwise, just hang around the area while others go.
In this case, there was an incentive. We were asked privately whether we wanted to go on a "1000 island" boat cruise. All must go or non at all. An incentive was a trip to the Montmorency Falls, the 3rd largest in Canada. Otherwise, we would just visit Place Royale and Plains of Abraham. All 36 travellers agreed to go.
Chinese tourists form a big group of travellers to Quebec.