4 points
Doesn’t GPL technically require you to attribute the upstream anyway?
The work must carry prominent notices stating that you modified it, and giving a relevant date.
3 points
*
Most open sorce licenses do, not just the GPL. I’m not sure what Minecraft modpackers do. But in the free and open source world, you’ll always find that attribution. Sometimes they have a list who wrote the software and who maintained it for what timespan.
2 points
