If you're trying to understand the impact of mastodon.social's new Terms of Service (which will also be the template for new instances once 4.4 is released) ... well, you're not alone. Here's a few discussions that I've found useful.
@neil has a blog post with Some thoughts on mastodon.social's updated terms
@sarahjamielewis has a thread at https://mastodon.social/@sarahjamielewis/114699476927561899
@mcc looks at the lack of a termination clause at https://mastodon.social/@mcc/114699201989866226
And here's the actual text of the new Terms of Service - https://techcrunch.com/2025/06/17/mastodon-updates-its-terms-to-prohibit-ai-model-training/