You're saying that would be more painful in a viral license setting, right? If so I agree, although I think there's a pretty long track record of financially incentivized companies being willing to take that pain. MongoDB's AGPL transition comes to mind.

But, to refocus on the case at hand: Astral's tools don't require contributors to sign a CLA. I understand (and am sympathetic) to the suspicion here, but the bigger picture here is that Astral wants to build services as a product, rather than compromising the open source nature of its tools. That's why the announcement tries to cleanly differentiate between the two.