I was ready to be unsympathetic - too bad for the company - but then I read TFA and it's a rug pull on a nonprofit teaching coding to kids.... https://hackclub.com/ (They do help clubs sell things, taking "7% of income", so they do have a revenue stream, but the money that Slack wants would pay a veritable army of student interns.)
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It's a way to create many forms of art, solve everyday problems and automate a plethora of machines in our homes.
You sound like an accountant whining about kids learning about calculators and statistics.