> The original stance of the open source crowd was more along the lines of the GPL -> GPLv3 -> AGPL, which expressly prevents this kind of thing.

Not wanting to further widen the schism but wasn't that the free software people rather than the open source people? cf [0], particularly the "not as strict" part.

> In the late 1990's Eric Raymond and others developed the term "open source" as a more business friendly term than "free software", with a more inclusive meaning where licenses that were not as strict about the passing on of modifications would also quality for the term.

[0] https://www.freeopensourcesoftware.org/index.php?title=Eric_...