The Gottis made milions with Gotti sr,Gotti jr and Pete from 1986 to 2003 and for sure part of this money will go to Gene;I don't know if John ever felt sorry for his brother destiny if yes maybe tell his sons to keep money for his uncle and to help him when he will get out.
I think that Gambino hierarchy must help Gene and don't shelved him because would be hard for the young generations to accept long sentence without flipping.
In the 2010s the american mafia must use the ancient rules for hace trusted men.