> Pro pricing is $7.25 per active user per month

This pricing model makes no sense for a non-profit that is trying to teach coding to teenagers worldwide. They will have a lot of users (remember) who might only send one or two messages once in a while. having to pay $7.25, for some who just asked a single question, is essentially extortion for a non profit like that who's primary purpose involves reaching out to as many people a possible.

> then I think that means they have over 2,000 active members in their Slack which does not sound like a "small nonprofit" to me.

those are not employees, but most likely the people they are trying to help.