Burger Time was a pretty big hit for the time. Not Pac Man level of success, but, I played it in the arcade and was excited to get it on my C64 (pirated, of course). It was ported to every major platform, and had sequels and imitators. So, not surprising they'd go to some lengths to prevent piracy, since anti-piracy tricks were very common at the time.
As I understand it, there were a variety of somewhat known tricks that were sort of pre-made (or at least were sort of design patterns that existed), and they'd vary the disk timings, track skip patterns, and combine various tricks for new major releases, so the copy cartridges and software would have to do a new release periodically to cover the new methods (and sometimes automated methods just didn't work, as it seems is the case here). So, while it seems like an incredible amount of work, it was likely merely repackaging existing work.
As I understand it, there were a variety of somewhat known tricks that were sort of pre-made (or at least were sort of design patterns that existed), and they'd vary the disk timings, track skip patterns, and combine various tricks for new major releases, so the copy cartridges and software would have to do a new release periodically to cover the new methods (and sometimes automated methods just didn't work, as it seems is the case here). So, while it seems like an incredible amount of work, it was likely merely repackaging existing work.