It says small amount of Mudfish Credit is added into your account for testing purpose. after completing email verification but it seems i didnt get any ;–; i want to check ping for playing league
Ooops. 
I’d set a trial credit now for your account. So I think you can use all mudfish nodes and features for a while. Please let me know if there’s any problems and questions.
It's normal if the Destination Server blocking connections from Mudfish Nodes. To change your Mudfish Node able to change what IP Address will shown.