Yeah. You can make any flavor juice in as small of a batch you want, so you can do flavors that might not be big sellers. But to make a disposable you have like a million unit run produced in China so you're only going to do popular flavors and the fruit flavors are most popular. So most disposables are fruit and fruit/menthol.
Discussion
Makes sense. I had a friend that ran a shop would send me all kinds of test flavors he used to mix up himself with my orders. Glad I gave it up, but I miss the mystery mixes and seasonal flavors.