That's what the Heart should do if it sends people back, send them to a gift shop on the way out! Kind of like theme park rides at the exit. Buy Waverly Bay-themed shirts! Pens! Coffee mug cozies! Your soul may have returned to your body, but if you miss your gem that much, you can buy official replicas to stick on your clothing and bags! It becomes a merchandising juggernaut! After all, what else are you gonna spend all the leftover this-world-only currency on? All proceeds go into the newbie fund or renovations to the Temple.

Something like that.