A long time ago, someone put up a canopy over their fortune telling booth and created the first shop. This store was fortune-based, but since then lots of different stores have popped up!
This shop quickly turned into ten (てん) shops! It was a good idea, after all, so all of the other people selling goods and services decided to copy it and create their own shops. The next day there were ten more.
Currently there are no similar looking kanji which exist in the WaniKani learning system