Here's a recent article about how Splinterlands uses faucets and sinks to create value for DEC, their in game token. https://www.publish0x.com/non-fungible-stew/splinterlands-dark-energy-crystals-faucets-and-sinks-xmkyedd

If you go back to when DEC and SPT were first released, there were several posts by @aggroed, @steemmonsters and/or @splinterlands about token distribution.