Oh? Do tell.
Surprisingly, according to my research, the claim about the maximum sentence being ten years is actually true... but only on a technicality. The USSR really did abolish sentences longer than ten years after Lenin's death. However, sentences were often arbitrarily extended, as in the case of
Maria Tchebotareva. And longer sentences were reintroduced during the Great Purge.
As for the claim about capital punishment, it's even more questionable. Under Stalin's regime, owning too much private property and dissenting from the regime were considered "heinous, serious crimes".
...I think I found the tankie equivalent of "Auschwitz had a swimming pool".
Rather ironic that an LGBT group is being Stalin apologists, since his regime recriminalized homosexuality. They'd have been severely punished for "muzhelozhstvo" under his rule.