He's some guy I found out there way back that burns the sets. I don't know his history but found him to be reliable for updates and I get an email when a new version of MAME comes out. That's about the only way I can stay on top of it.
I know his Paypal account was gone for a while, assuming bc of this and a complaint by someone but looks to be back recently. I haven't ordered from him in about 5-10 years but he got it done back then.
Idk about legal. Seems a person is paying for the burning service, not the roms, blah blah. May be one of those gray lines so I just stay in my boat over here in international waters to avoid upsetting any one nation
All of my assumptions above are exactly that, though. I have no idea of facts in any way so I don't dare to comment 'officially' in any capacity.