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It would be nice if the "red envelope" messages didn't disappear completely after one view. Maybe they could be queued for auto-deletion (like voicemail), something configurable (say 7-14 days after first view.) Is it a performance or storage concern? Deletion or archival doesn't bother me either way, it just would be nice to see them for a few days (since sometimes it's hard to find the same message again if one thinks of another follow-up comment/Q/A).