Wouldn't you lose multiple sticks or fry multiple motherboards as you scale and do 1000? If you're frying 1 at 10, that means you're frying 100 at 1000. Your costs etc will scale as well unless you actually lower the risk/reward ratio, no?
No, it does not. Every large company eventually has a big accident. They survive because they have both the resources (e.g. to fight ensuing legal battles, or pay fines, or simply weather a hit to reputation and the resulting downturn in revenue) as well as redundancy, different types of insurance, and so on.
They also survive because they invest those resources in some amount of mitigation ahead of time. They don't survive when they don't scale their mitigations along with the business.
The point is that if you have a 10% chance of frying motherboard, at 10 a week, you might expect 1 fried p/w, but it could easily be more which may be catastrophic.
At 1000, the number of fried boards will be more predictable and therefore the risk to the business is lower, even if the long-run averages are the same.