Can I use several loyalty programs at once? Will not this interfere with each other?
I think you can use as many loyalty programs as the user wants. In fact, none of them excludes the other, right?
By the way, will the service be accessible without geographical restrictions? I read something that the project will work only in a number of cities like Moscow, Sydney and Tokyo
I do not think so. Most likely, the service will be available without restrictions, but it will be expedient to use it in these cities. After all, what's the point of participating in the loyalty program of Tokyo's café, if you live somewhere in Eastern Europe?