Most online casinos use geolocation to find out where players are coming from and modify the content displayed based on this information. Among the information that is modified is the details of the bonuses that the casino offers. This means that Canadian players can quickly see the value of bonuses offered in CAD without having to calculate it themselves. As for payments, if a site allows deposits and withdrawals in CAD, it is very likely that it also offers bonuses in that currency. As far as the casino is concerned, bonuses are paid out like any other winnings.