Both of those things are very interesting.
I'd never even considered this possibility, but given that the 255 lives trick was apparently publicized, it could have been read about and widely utilized. This would make it a solid alternative explanation (maybe the best yet?) for how the legendary Mr. Frampton could have achieved the puzzlingly high 1,2xx,xxx score that he got, without knowing any point-pressing techniques, or even knowing that the kill screen was coming. Just die like crazy and play lots of boards until L=F...
As for the 886K thing, that's even more interesting, because if true it would be semi-official confirmation of what we all pretty much know - that at the time
got the DK "world record" it wasn't actually the world record. That is to say,
(not to mention
) had unofficially gone well beyond 879K long before the year 2000.