So you're claiming that people are working on smartphone-controlled candles for fun? Because LuDela seems like it's a startup trying to make money, not a group of people trying to have fun.
Here's a company that makes money off this community, which is probably made up of people who think making random crap you can control with your smartphone is fun: https://www.adafruit.com/
Things you don't understand can be fun, including make interesting gadgets that you don't find useful.