What if Leonid Brezhnev decided to build separate space programs in Eastern Bloc countries instead OTL Interkosmos? I think that this could looks like this:
Building cosmodroms in two-three countries - let's say - Poland, Czechoslovakia and Bulgaria. Estabilishing space agencies in interested countries which will build their own spacecrafts launched in their cosmodroms by Russian rockets [later maybe their own]. I expect that these countries would launch only few satellites and sounding rockets but development their own space programs [under "Soviet protection"] will give prestige to whole Eastern Bloc [Look, we share our technology with our allies!] and technological base in these countries. After USSR collapse they ATL will have rocket engineers, own spacecrafts, students interested in space travel and "brains" - maybe Polish/Czech/Slovakian genius like Korolev or von Braun? Maybe these countries will provide modules for ISS or even estabilishes East European Space Agency and their own space station in 2000s?