Don't be so modest. Anyone who can whip out a 300K+ on
Crazy Climber in just a few attempts definitely does not suck, and you have the only known reported score of 500K+. That is a
huge score on a very tough game. No one tracks how many credits it takes to get a world record score. All that matters is that you have the skills and you pull off the performance and can document that performance adequately (via live referee or with unbroken video that includes filming the game's settings). As a hypothetical example, does anyone care if Steve Wiebe had to play twice as much as Bill Mitchell to build the skills necessary to play
Donkey Kong at the highest levels and claim the world record? No. No one cares who practiced more. (In fact, in sports all that extra practice to get to world class level is admired, not looked down upon.) The only thing that matters is who's on top, and who's on top is whoever has the highest verified score at any given time.
So promise me you won't ever play
Crazy Climber again without recording.