Amasi Fermented Milk

I have changed the dynamics of trade in my suburb. I asked the corner store whether they had amasi -- a traditional "thick curdled sour fermented milk". No, they said, but they would try to get some in. They took a minimum order -- but said it didn't sell out. For whatever reason, they took another order. By now, they have doubled the order, and it all sells out. Wife E says of course, they just need to look at their clientele, to see that it will sell. Traditional amasi contains a wide variety of yeasts. OBSERVATION: The same applies to Church fetes. Look at your clientele.