YITH WooCommerce Affiliates Premium you won’t run this risk: the plugin will allow you to choose how long affiliates will keep receiving commissions from the users reached through their links.

YITH WooCommerce Affiliates Premium : Admins will have full control of their affiliates thanks to detailed click reports generated by each single link, giving you the chance to choose whether you wish to pay commissions manually or set up an automatic payment system.