You might be interested to know that I was also wrong to act as if there was an air of mystery surrounding the definition of '1kb'. It's readily apparent that the '1k' refers to 1024, as it always has when speaking of bytes, but also because the first (some would say only) sentence on the 1kb.club page helpfully spells out that 'kB' is short for 'kilobyte', and that a kilobyte is 1024 bytes.
You might be interested to know that I was also wrong to act as if there was an air of mystery surrounding the definition of '1kb'. It's readily apparent that the '1k' refers to 1024, as it always has when speaking of bytes, but also because the first (some would say only) sentence on the 1kb.club page helpfully spells out that 'kB' is short for 'kilobyte', and that a kilobyte is 1024 bytes.