I believe mudfish credit to be being used for steam (and maybe other) downloads while the ffxiv client (the only item installed) is running - is this the intended interaction?
First sorry for this incovenience. Unfortunately I think your issue is related with Amazon EC2, Twitch and Mudfish and CDN and Mudfish links. Please read these documents. However I’d reset your mudfish credits little bit.
Hmm, yeah that looks like it could explain what is happening. Thanks for looking at this; I will be sure to be more careful in the future.