The charges stem from two February 2008 burglaries in South Philadelphia in which he acted as a lookout while his brother cut holes through the roofs of businesses.
Taleon Goffney, a career criminal and alleged mastermind of the operation, got three to eight years in prison after pleading guilty in July to the same crimes.
He's also serving an additional four to eight years for a burglary he committed alone in the city in December 2007.
Assistant District Attorney Caroline Keating said the negotiated guilty pleas were so vastly different because of the differences in the brothers' criminal records.
"[Keyontyli] had previously been a working member of society up until this point," Keating said. "But his brother is a true career criminal."
Taleon Goffney, who once butted the back window of a police cruiser to escape and swam to freedom across a lake while handcuffed, used a handsaw and ax to enter the stores during the robberies.
According to testimony, Keyontyli served as a lookout along with the twins' mother, Towana Goffney, who allegedly left her post early on the night the brothers were caught in a police sting.
Thursday, all charges against Towana Goffney, 46, were officially dropped by the prosecution.
"Our decision was that the evidence against her was lacking," Keating said.
Keyontyli Goffney said he is continuing to model, and travels between New York City and New Jersey.
In previous interviews with the Daily News, he said he and his brother, who went by the screen names Keyon and Teyon, had put their hard-core Internet-porn careers behind them long ago.
As part of his plea deal, Keyontyli Goffney got back his 2003 Volkswagen Passat, which he used during the commission of the crime,
"I'm very sorry and I only hope [the victims] can see that justice was served," he said.
Judge Lisa M. Rau, who presided over the case, told Goffney:
"Make sure you stay on the straight and narrow."