I think for fast arcade games (for example 8bit-Slicks, 8bit-Strike), 8bit-hub (or the no longer available Dragoncart) are more suitable.
I don't know what are the issues but 8bit-Slicks lagged when I tested it with FujiNet and worked with 8bit-Hub and Dragoncart.
At the moment there aren't arcade online FujiNet games.
I hope to be wrong because everybody has FujiNet therefore more people would play online.