Ever since Canada's government began phasing out the Electronic Travel Authorization (eTA) requirement for visa-exempt foreigners on August 1, 2015, many independent websites have popped up which mirror the eTA application, but charge higher than CAN$7 for subbmitting the request.
Travelers seeking an Electronic Travel Authorization (eTA) to fly to or travel through Canada should only use the official Government of Canada website, Canada.ca/eTA.