[Jach]

Seems pretty clear. They cannot stop you from redistributing the binary of v1, and anyone you redistribute the binary to can demand the source if it's not already included. They can say that if they find out you redistributed v1, they're not going to give you v2 in the future, but if you get v2 some other way you can still ask for the source (and whoever distributed that one might not get v3 etc.). There may be further restrictions from trademarks to make redistribution perfectly legal (like CentOS just removing mentions of RHEL) but it can quickly become a lost battle for upstream.