As of 1/20/13, Maximus Arcade is not dead. Nor is Mameseer.
I just updated my cabinet that I built in 1998 running Mame .36 with an Arcade@home frontend. Popped in a newish computer and acquired a full set of .0143 with snaps, marquees, and samples. After studying screen shots of every frontend, Maximus Arcade looked the best to me. I took a chance, paid $25 on Friday via PayPal, and received a nice email with my codes for 2.09 and 2.10 from Mameseer on Sunday.
Perhaps if more people knew you can still get a code, more people will support Maximus Arcade and Mameseer will keep working on it. Although I am just running MAME, Maximus Arcade is running flawlessly for me, so I'm not sure what needs to be updated.