Tell us about yourself!
Getting more energy that you put in is the entire point. A simple example is the car you run. You provide a spark and get motion, air conditional and the power for another spark. The only thing you need is more fuel.
Per the original article you can put one together for $500. But the original articale was written in the 70's.
It's just the smallest fusion reactor. Not meant to be super efficient. Just fun to build.
It would likely get sucked out with the rest of the gases. Some deuterium/tritium would stay to get fused again or failed and fizz.