A while ago, I received a message on the IRC which you can view in the attachments from someone named EazY, he gave some information on the person asking for keys.
As mentioned in the conversation, the person is using an offline key for Blockland V14. My conclusion is that he temporarily disables his internet for the key to succeed, then enables it to go onto the IRC and ask for keys. This should hopefully stop soon, if he buys a key like EazY mentioned...