Thank you for the TBT! You can earn more by posting in the message boards. There's more information about how they work here, if you're curious. 
The Bell System: Beginner's Guide
What are Bells? Bells are a virtual currency exclusive to The Bell Tree. With them you can purchase items from the Shop, trade with other members in the TBT Marketplace, enter lotteries, and more. How do I access the Shop/ABD/Lotteries? At the top of the page below the big Tree banner there...
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