Game contributions are the rates at which a game counts toward meeting the wagering requirements attached to an online casino bonus. Game contributions can directly impact the size of a wagering requirement.
For example, Caesars Palace's 100% match up to $2,500 comes with a 15x wagering requirement. The game contribution rate for slots is 100%, so the 15x wagering requirement applies to slot play. However, the game contribution rate for Video Poker is 50%, turning that 15x wagering requirement into a 30x wagering requirement.