What is the maximum number of chances I can get for the entire drawing?

There are no limits. Chances are awarded for every 2,000 rubles of the total amount of purchases made with a credit card: the more you spend, the higher your chances of winning a car. There is no upper limit. Plus, for each new status, you receive bonus chances. And if you reach the highest one, “Legend,” you will receive +15 chances as a gift. 
See the promotion page for detailed terms and conditions for awarding chances and obtaining statuses.