Just to reiterate what I said above:

Quote Originally Posted by Reiterpallasch View Post
ITT: We learn that 1-99% ≠ 100%

Just because you missed once, twice, or even 3+ times in a row at 99% does not mean the game is lying and that the chance for success isn't really 99% as it claims. "A couple times" is such a miniscule sample size that there's no way you could ever possibly hope to get an accurate %. You'll need to mine 10s of thousands of times to even begin getting an accurate measurement.

I'd be willing to bet that if you mined 1,000,000 ore at 99%, that you'd end up with roughly 990,000 ore while also getting huge strings of failures in the middle somewhere. Even if you missed 100 times in a row at some point, your success rate would still be 99% in the end.

This kind of reminds me of ye olde FFXI, back when people would claim things like "SAM WS have terrible accuracy, I always miss!". They'd swear something like a 20% acc rate, until they were parsed and they turned out to be capped at 95% the entire time.