Ringing the icon of a hotel styled desk bell on the left side of your Tiki Resort game will allow you to summon Dan the Automator. Dan is a new game feature that promises to collect money and charms from your attractions, pick up trash, and tend your pets. He comes with a chart that'll let you to see just how much work he's done by how many things he's collected on his shift.
Dan has two shifts you can set him up on. A 15 min. shift requires 25 Coconut Drink Charms, while a 3-day shift goes for 39 Facebook Credits, or roughly, $4 USD.
Coconut Drink Charms increase the walking speed of your tourists, leading them to visit more attractions, which means they'd spend more. You can buy a set of 50 at the in-game store for 149 FB Credits, which is approximately $14.90 USD. So unless you've got an attraction that generates that charm, the 15 min. shift isn't Dan's best deal for you.