Why don’t the Red Envelopes work anymore?
Red Envelope codes may stop working because these promotions have a limited validity period and each envelope offers a specific number of rewards. When all the prizes have been claimed, the code expires or reaches the limit set by whoever created it, and it can no longer be used.
Also, some codes have participation restrictions, such as a maximum number of users, region, account type, or specific requirements. That’s why, even if a code was published recently, it may show as used up or unavailable when you try to redeem it.
In short: if a Red Envelope used to work and now doesn’t, it’s most likely that it has expired, its rewards have run out, or the participant limit has been reached.