1) The income of typing and copying shops is not so good, the capital flow is too narrow, and wages, store rent, utilities, public expenses, material consumption and so on have to be paid. There is no profit.
2) Most of the shop assistants are short-term workers, and they run away when they find a suitable job.
3) If you want to work in such a store, you can persuade the store not to make money just by typing and copying, but to increase services, which take up very little space, such as MP3 download, public telephone, proxy fax, mail service, as well as selling cold drinks, developing photos, tobacco, alcohol, sugar and tea, trinkets, daily necessities and so on. In order to expand business projects. I think the shopkeeper will support you to do so. With luck, the salary can be a little longer.
4) Not a long-term solution. If you are idle at home or have a part-time job, I think it is ok. It's a good thing to get more, right?