New Zealand: Bubble Teas of Broadway

I love bubble tea, but there’s an excessive number of shops in Newmarket. They seem to just keep on coming… which begs some questions. How do they all stay in business? How do customers choose? Is this somehow a highly profitable industry? Is it just an easy front for money laundering? How much better can one bubble tea be than another?
And so, in the name of science, my boyfriend and I have decided to investigate.