http://xckkoskvvw6ipkteupckakhhewz3rg3ghwkajw4swzgznu4724bzxyid.onion/faq.php
Delayed messages have at least two use-cases: By setting the minimum delay to 0 days and the maximum delay to 1 day, MarbleBox will pick a random delay of up to 24 hours, obfuscating the time of the day you sent the message for other users. Of course we, and our hosting provider, have access to the contents of the message and the real time that it was submitted to us.