Op is talking about micro currencies which operate in certain localities within a country besides the legal tender which is used all over the country. We don't have them in my country, but I have read a bit about them being used in communities in other countries.
thanks, this was helpful, I was confused because I thought OP was talking about the country's FIAT currency and it is my first time hearing about what the OP was talking about.
In my region I learn that there is one of these currencies for 10 years. I have never seen any business with the logo of this currency. In addition, you must join the association that issues them. Honestly, I don't understand what it's for.
purely an assumption, probably a way to support local business(just like one member suggests).