You need to think; how much effort and time is required to crack it, compared to the amount of money being offered? If it takes someone approximately two years or longer to crack it, assuming they're working on the crack full-time and have no other income source, they'd end up earning less than the average American makes in that same amount of time (~54k per year, compared to 100k for two+ years work). If that person manages to crack it in under two years, they would earn an about average or greater-than-average amount compared to what the average American would have made in that same amount of time. And, consider that this is something far outside of the skill set of the average American; comparing it to the average income is severely lowballing the value of the time of any person capable of this.
I wouldn't say 100k is something to scoff at, for the average American that's worth about two years of their lives. But, considering the amount of effort that would be required for the crack, and considering that it needs to be a fucking web exploit that overrides hardware-level security features, and must be executable through a guest account with no privileges, I don't think 100k is an appropriate amount.