I'm sorry, I don't buy it
166 million in the first few days (under 10 attempts?), now up to 279 million in the Diner event.
The highest value shot in the game is worth 12 million, max. You can't hit it repeatedly, it takes quite some build-up. You'd have to hit it 20+ times to get to 279 million. Most people don't even hit it once per game (even a non-maxed one, which can be worth much much less).
Ramps can be worth 500k in multiball, if you complete both rushes and keep multiball alive. You'd have to hit 558 ramp shots, in multiball, after completing both rushes, to get to 279 million.
279 million is an average of 93 million per ball for a 3 ball game, 56 million for a 5 ball game. Right now, to crack top 100, you have to score 33 million total.
Someone has a 514million score game outside of the event.
You can go watch live tournament videos where people win Diner with a score of 12 million.
It's really hard to take digital pinball competition seriously, and it's kind of silly that to win limited-time in-game collectibles you're competing against these scores.