Re: permissive, I concur! Poor wording on our part. Permissive-r than AGPL perhaps was our thinking. :) But you're absolutely correct that the GPL is not a permissive license. Updated the post!
As for GPLv2 vs v3, in a high-level post like this they're reasonably identical. v3 brings in some nice subtleties like ASL compatibility (a biggie for us!) as well as better patent language. But in terms of use cases where the "virality" kicks in, they're the same.
As for GPLv2 vs v3, in a high-level post like this they're reasonably identical. v3 brings in some nice subtleties like ASL compatibility (a biggie for us!) as well as better patent language. But in terms of use cases where the "virality" kicks in, they're the same.