I never saw any evidence of it while I was there. the guiding principle for political speech was along the lines of "everything is debatable within the revolution, nothing is allowed outside." which seems pretty permissive to me. like you could advocate for neoliberal reforms if you want, so long as you aren't saying the revolution needs to be literally rolled back and give all the property back to US corporate interests, repeal the constitution, and reformulate the Batista government with a bunch of Miami psychos.