Posted February 16, 2025
Humble Bundle updated their terms of service on Dec 24, 2024 to state the following:
"In some cases due to various reasons, a key may not be available to replenish and in such cases, Humble Bundle may offer the same game on a different platform (“Alternate Keys”) if this is a possibility. In cases where Alternate Keys are not available to replenish, Humble Bundle is not obligated to provide them. Keys, including Alternate Keys, for all games, whether bought in a Bundle, Humble Choice subscription, or individually, must be redeemed within 3 years from the purchase date. Humble Bundle shall not be obligated to provide any keys, including Alternate Keys, to games that are unredeemed within aforementioned timeframe and thus become expired."
Source
"In some cases due to various reasons, a key may not be available to replenish and in such cases, Humble Bundle may offer the same game on a different platform (“Alternate Keys”) if this is a possibility. In cases where Alternate Keys are not available to replenish, Humble Bundle is not obligated to provide them. Keys, including Alternate Keys, for all games, whether bought in a Bundle, Humble Choice subscription, or individually, must be redeemed within 3 years from the purchase date. Humble Bundle shall not be obligated to provide any keys, including Alternate Keys, to games that are unredeemed within aforementioned timeframe and thus become expired."
Source