So STEM admissions at elite schools (especially medicine and engineering) are indeed very competitive and there are upper middle class families who do think that nothing short of entering these schools is good enough. While 11 years is pretty hardcore, trying for 2, 3 or even 4 years is not uncommon at all. One of my cousins tried for medicine for such schools several times. People that fail admission exams will often not settle for safety schools; these are considered completely worthless in the eyes of someone aiming for elite schools. Instead, they enroll in cram schools to try again the following year. This is pretty normalized, it's even expected that you'd do that after your first fail.
The exact method of cheating doesn't really matter. All you need to know is that cheating using electronics does happen and has happened since forever. It was already a thing twenty years ago when I was going through admission exams. Schools have always had measures against cheating. In my country in the 90s, they were pretty low tech (e.g. enforcing no cell phones), but I hear some places in China now have some seriously over-the-top anti-cheating mechanisms like signal jamming.
I went to a state school in a country where the only way in to university is by taking a test (this was in the early 00's), so I went to one of these cram schools after I finished high school. The cram school was focused on students of lower income families who would otherwise not have the means to attend a more prestigious one, and I remember in the inauguration ceremony for my year's class, one of their former students was invited to give a speech.
Her story was that after four years trying to get into medical school (i.e. four years attending the same cram school), she was given a tuition scholarship to a more prestigious cram school for her fifth year, and then she finally passed the test.
The thing is, this wasn't even an elite school -- it was just the only federal (state-funded) medical school in our state. The fact that the students' only way in was by taking the exam -- extracurriculars were not taken into account there also -- only made it even more of an _achievement_ for you to actually get in, especially if you were not from an upper middle class family.
> Engineers calculated the load Fast had in needing to serve their traffic. The Fast button was rendered less than 500,000 times per day - rarely needed to ever serve more than a few requests per second.
> One of the few warning signs engineers noticed is how Fast spent far more on infrastructure than the scale of the operation would have called for. Engineers sometimes brought up suggestions to scale infra down, and save costs - given there was not much revenue generated.
Sounds like the whole thing could have run on a single cheap VM, perhaps with a second one for redundancy.
> [sales] signed up a large number of smaller businesses on the platform. [...] However, integrating these smaller businesses was challenging thanks to several customizations needed for each new customer.
The ratio of revenue per each small customer vs the total cost of integration (and very likely on-going maintenance) was probably at least an amber flag somewhere for those who had visibility of it.
But maybe there was on-going hope that they would be able to sign up a big customer and integrate them before they ran out of money?