Just wanted to clarify for anyone - You're correct on the math, as what you described was probability. However, since there was no "bad luck protection" where the chance goes up each time it didn't drop, it doesn't matter how many times it was run. Each run individually had that single chance for it to drop, that is unrelated to if it had been run before.

Don't take this the wrong way, as I'm pretty sure you know what I mean (difference of probability and chance).

I'm trying to clarify for those that might not that there is a real possibility that even after say 150 runs or even an infinite number of runs it STILL might not drop, because there was no bad luck protection, due to the chance being so low. However, the probability of this happening would be very low.