Not to sound inconsiderate, but I would suggest writing a blog doing research for people instead of making a tech solution. MVP can use existing tools. You will find that a lot of these small businesses have Square or Toast at their stores. Those are going to use a different service than the one I mentioned above. Its always tempting to build but it could take weeks before you can provide these small businesses with a tech solution and there might not be in the infrastructure to help them use the gift cards.
Not to sound inconsiderate, but I would suggest writing a blog doing research for people instead of making a tech solution. MVP can use existing tools. You will find that a lot of these small businesses have Square or Toast at their stores. Those are going to use a different service than the one I mentioned above. Its always tempting to build but it could take weeks before you can provide these small businesses with a tech solution and there might not be in the infrastructure to help them use the gift cards.