Thanks man :). There are no refunds, because messaging is not a standardised service - meaning senders cannot be assured of a solid deliverable(hence PWYW).
Creators might send great responses to cheaper messages, if the message is interesting and might not respond at all for a high paid message if it is something that takes their privacy away.
Creators might send great responses to cheaper messages, if the message is interesting and might not respond at all for a high paid message if it is something that takes their privacy away.