Huh, what are they doing different than me? I used to burn cheap CD-Rs, they worked, and play them on my 3DO all the time. I'm not sure I ever actually bought any games for it (I got it in 2007). I never had any issue playing the games I burned. I don't have a 3DO anymore or I'd try it now.

I still think it's low-effort crap, and burned CDs and DVDs don't last forever. My dad used to burn lots of DVDs of home movies and there's been a lot of disc rot that's ruined some of them [1]. If I had paid $60 for Plumbers Don't Wear Ties and it turns to a coaster in six years, I'd be pretty pissed. At that point, I could pretty easily just torrent an ISO and burn it myself for like twenty cents.

[1] Fortunately my dad was sort of nuts about burning like five copies of every DVD he made, so we haven't lost much and most of the stuff has been backed up on more durable sources now.