this post was submitted on 28 Aug 2023
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Wasn't the Affero GPL (AGPL) created exactely to enforce copyleft in a SaaS environment?
Quoting from the GNU website:
The problem is these licences treat network interaction as intrinsically different to linking against a dynamic library. If you link against the code with a binary API that's a violation, but if you link against it with an HTTP API it's not.
GNU Affero doesn't help with that. Under either GPL or GNU Affero, all you need to do to defeat the virality of the licence is package the code as a service and put all your modifications into a separate proprietary program that interacts with it.
That's why MongoDB tried to force users to open source their entire service if it involves a copyleft program. It's clumsy but I can see why they did it. We need a modern licence that treats any form of interprocess communication the way the GPL treats linking.
(The page you linked goes on to say that GNU Affero doesn't solve the SaaS problem and it's impossible for licences to address it.)