I see you're still missing the point like no one else, Agent327!
If they had simply meant "do not propose anything regarding diamonds", then that's what they would have written, isn't it? What they mean is that any new way of getting diamonds must be at least as hard as any current way.
So, then, what about that 50% chance of getting 1000 diamonds? That sounds pretty sweet, right?
It absolutely does. Unfortunately, you're the only one to have suggested it (you have to be careful about that; it's against the rules, you know). The suggestion from
@Xenophon the Prophet 576 was a 50% chance, out of a 1% chance, out of a 1% chance, per year. For the mathematically challenged, that's a chance of 1 in 20,000 per year. In other words, you only have to play the game for 10,000 years, in order to get the 50% chance you're talking about. If you keep going for 20,000 years, that'll rise to a whopping 75% chance. Sweet! You gotta eat your vitamins, though, to have a shot at that.
Anyway, over time, it should even out to 1 diamond every 20 years. To make it even out, though, you'd have to live sufficiently many 20,000 year periods to get a statistically significant result. So, just off the top of my head, not actually calculating it, about 20,000,001 years in total (statisticians like sticking that '1' at the end; it gives more decimal points to the results). Think how many diamonds you'd have, then! Of course, when you consider the cost of all those vitamins, it may be cheaper to just buy the diamonds...
Phew... Time to disentangle myself from Agent327's phantasms, and get back to the real world: If anything, a 1/20,000 chance at 1,000 diamonds is much too little. On the upside, Agent327's failure to comprehend the math demonstrates that it would still work as a powerful incentive, to some.
Yes, that would be really, really silly! So silly, in fact, that I think stronger words than "silly" would be appropriate. Fortunately, though, there's no need to use strong language, as no such thing has been suggested. While I understand that there has been some room for misinterpretation, I had no problem with it. More significantly, even Agent327 failed to misinterpret it!
The suggestion is, quite simply, that the GBs would become open for looting. Someone else would then be able to loot your Arc, for the benefit of their own guild. Extremely annoying, but hardly devastating.