It's Bill that's spent the money on his cussed booze and gambling. Way of the Lawless Max Brand The gambling houses can do it, and so keep on breaking the law.
When Winnie tries to drink, Jesse stops her. Then Mae and Miles appear. Alarmed at Winnie's discovery of the spring, they kidnap her. Winnie learns that the music she heard comes from Mae's music box. She also learns the Tucks' secret: the water in the spring is magic and has made them ageless.
Later, when Dawn snuck out of the house on Buffy's birthday in order to go to the Magic Box, Spike, who was standing vigil, decided to go along in order to protect her from any possible threats. He helped her break into the store, but ended up partly responsible for Dawn discovering her identity as the Key.