Interesting, it seems that it's Source Available but converts to Open Source (AGPL) in 2031. First time I've seen licensing like that.
https://github.com/clockworklabs/SpacetimeDB/blob/master/LIC...
ml5.js has a similar license: https://github.com/ml5js/ml5-library?tab=License-1-ov-file
Their license is basically "use freely unless our community decides you violated the code of conduct, for three years"
The date keeps changing on each release so every version bump becomes AGPL five years from the date its published. Its an interesting model, but necessary to be aware of the nuance in case you ever want to consume it.