There are limited total prize amounts for certain categories with Banco, Banco spécial, Jour de paye, Triplex, Astro, Lotto Poker, Sprinto and Québec 49 (for the 5/6+ bonus category only). For example, the maximum prize amount for Banco is limited to $4 million per draw, for each category.
The limited payable amount for a draw is likely to be reached when the winning selection is held by several people.
The maximum payable amount for each game is written on the back of the selection slips. This information and more, including the prize structures and the chances of winning, can also be found on the pages related to each products.
The answer can be found on this page.