It's not exactly whizzing around at light speed in the way that you imagine if it's beneath an event horizon. The entire point of an event horizon is that everything beyond it physically cannot move outward. The horizon isn't some kind of physical barrier, it is just the farthest distance at which the black hole's gravity becomes inescapable, that doesn't stop applying just because you've moved past the horizon, and in fact it only becomes more true.
If you imagine any sphere beneath the event horizon which is centered on the singularity, that sphere is just as inescapable as the farthest such sphere which we call the event horizon.
Additionally, the event horizon is inescapable to everything. Even gravitation is transmitted at the speed of light, and cannot outrun the cascade of inwardly falling spacetime beneath the event horizon. So no possible change in the distribution of mass within a black hole could have any effect on the configuration of spacetime at the event horizon, or even on any spacetime further from the singularity than itself.
This betrays a very naive concept of "knowledge" and "understanding". It presupposes that there's some kind of platonic realm of logic and reason that an AGI just needs to tap in to. But ultimately, there can be no meaning, or reasoning, or logic, without context. Matching a pattern of shapes presupposes the concept of a shape, which presupposes a concept of spatial relationships, which presupposes a concept of 3 or even 2 dimensional space. These things only seem obvious and implicit to you because they permeate the environment that your mind spent hundreds of millions of years evolving to interpret, and then tens of years consuming and processing to understand.
The true test of an AGI is it's ability to assimilate disparate information into a coherent world-view, which is effectively what the pretraining is doing. And even then, it is likely that any intelligence capable of doing that will need to be "preloaded" with assumptions about the world it will occupy, structurally. Similar to the regions of the brain which are adept at understanding spatial relationships, or language, or interpreting our senses, etc.
I'm not sure if I missed something in the article, but it appears to me that the article does not take in to account the change in supply due to change in effective wage caused by decreased utilization. The supply of drivers available would be based on what money drivers actually take home, not just the nominal price, so any decrease in the money taken home would result in a decrease in supply, meaning the positive impact on drivers wages would be larger than that computed in the article.
At high enough energies the laws of physics are actually different. Two of the four fundamental forces in physics, the electromagnetic force and the weak interaction, are actually a single force which only appears to be two separate forces at "low" energies/temperatures, with low being the pretty much all temperatures in the universe after the Big Bang.
It is completely reasonable to test whether phenomenon that hold at low energies still hold at high energies, and that may be the only way you're going to find more fundamental physical laws. Especially when we know quantum theory is incomplete, since it is currently incompatible with general relativity.
There's a lot of discussion here in the comments on whether this can meaningfully be called a vulnerability if you can only "see the temperature of your server".
Setting aside that the vulnerability doesn't actually allow that, isn't this potentially a Spectre / Meltdown vulnerability? This is an unprotected endpoint that conditionally executes code taken from user input. If the branch predictor can be trained to speculatively execute arbitrary code from the input, information could be extracted via endpoint timing using a similar methodology to Spectre or Meltdown, right?
If you imagine any sphere beneath the event horizon which is centered on the singularity, that sphere is just as inescapable as the farthest such sphere which we call the event horizon.
Additionally, the event horizon is inescapable to everything. Even gravitation is transmitted at the speed of light, and cannot outrun the cascade of inwardly falling spacetime beneath the event horizon. So no possible change in the distribution of mass within a black hole could have any effect on the configuration of spacetime at the event horizon, or even on any spacetime further from the singularity than itself.