In A Stygian Gambit, Libation served a group of strangers, but over the course of their conversation, noticed some oddities about them; that evening, the casino was sent into panic when Thrill's keycard had been lost. The next day, he clocked that they had returned while wearing disguises, and given his previous experience of bar robberies, put together their plan.
Over a long drink and conversation about his own experiences at the Crooked Tankard, he slowly got the truth out of Nessa Nina Quickpick Rumbauld Pennyluck. In exchange for keeping quiet and helping to keep staff busy during the Grand Minauros Invitational, he asked for an equal cut of the thieves' take. Their heist was successful, and in the midst of the operation, Nessa slid Libation a bag of gold coins.
Though they had stolen over five thousand, however, they only gave the bartender one hundred gold, as they knew he could not realistically rat them out without compromising himself.