that's not the point even. They are attempting to build credibility in two ways: 1. this model is SO advanced that there are huge risks, never before considered. 2. we're doing the super-responsible thing in incentivizing work that addresses this. #1 is unproven and frankly, unlikely, which makes #2 meaningless. The fact that the "prize" is so low & structured this was suggests that they're not that concerned but do think it's likely that a bunch of people will find things. If they truly thought their model was so good they would be confident issues would be both rare and very critical, then offer huge rewards with no limits because they'd be much more confident no one would claim it.

Yes, I was about to edit in that I think this is simply a media/PR stunt before I got so many replies so quickly. They get bonus points because the structure is so insulting that it may not engender many serious participants, in which case it may go unbroken, in which case they can go to the media and proclaim "look, we offered a reward, but nobody broke it! Our model is objectively the safest in the world!".