Can't speak for MAME it's LAME, but basically the run down is this.
I paid $10 to hit the 2nd tier for added games, but even a $1 works to start. You get individual downloads, no Steam DRM baggage front end bullshit.
Each game is a zipped up set of ROMs licensed from SNK/Playmore. They bought the rights to the emulator NEBULA at a company called DOTEMU known for mobile apps mainly. They tossed a front end on it that's nice and basic, threw the ROMS in a zip, and nebula fires the stuff up and that's roughly about it really.
Even if you hate the emulator or have some other lame crusade out there with it, you can for $10~ get over 20 NG arcade games legally owned with the original ROMs, can't beat that.
Billy Connolly - Statement of the Century
"If women are so bloody perfect at multitasking, how come they can't have a headache and sex at the same time ?"