Greenlinkads fool joke in April

Greenlinkads which was started in October last year has been shut down on March 16th. The admin had given that he engaged with offline business and lack of time to run the program as an excuse. The admin also promised that he was going to make refunds on April 1st. The announcement as below:
“I want to tell you all about bad news to GreenLinkAds.net. I have to closed down GLA for a while. The upgrade button and sign up link already clossed.

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Is it a joke or something else?