The price came out of nowhere for Hack Club. Slack had a unique agreement, also lowering the minimum age, with this specific nonprofit. I'd argue that for their scale, 200k/yr from 5k/yr with a week of warning is absolutely crazy. And I'm talking from experience - I got this message literally today, out of the blue, that after eleven years, we had to migrate within days. The community is so much larger than I imagined previously, and it sucks that it just had to end this way.
Yeah, like, it's weird to wish for more details, because I'm sure Hack Club is wishing they also had more details right now! If they knew the what and why of it, it'd probably be in the post!