This post:

https://support.discordapp.com/hc/en-us/community/posts/360032357692-Typo-in-Emoji-file-size-limit-desktop-app-

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Was incorrectly closed as being a duplicate of a post about emoji file size.  The above post is a comment about incorrectly stating that the emoji must be under 256 kilobits (kb) when when it likely wants to use size in KiloBytes (KB).

Personally, I try to use base-2 prefixes with base-2 units (like Byte), and base10 with single-units like bits.   It's usually considered poor form in to mix bases in scientific and mathematical computations, like using decimal prefixes with a power-of-two size (despite the SI standard, who's governing body should be ashamed at accepting industry pay for standardizing bad practice). 

Think of how odd it would sound to use power-of-two prefixes with nouns indicating non-power of 10 measures, like 1.2 deka-dozen (12 dozen or 1 gross), or talking about gas mileage of 1 hecto-mile per deka-gallon.  My ears cringe. 

If they are talking about 'bits', that's a base unit, so using power-of-10 prefix 'k' would be entirely appropriate