TIF money has finally been applied to a good cause: Nancy Kamp, who opened grocery and deli Half Italian in March just across from the Logan Theatre, did so with the help of funding from the much-criticized tax increment financing system. It’s a charming place, full of staples like olive oil and vinegar, fancy salt, canned tomatoes, tuna, organic bulk dry goods, olives, and fresh pasta, with a small produce section and a well-curated selection of wine and beer. On a blustery evening last week, the store felt like a cozy refuge from the cold, wet weather. Kamp has kept things simple, right down to a cash-only policy that outraged Logan Square Yelpers, whose credit cards you’ll pry from their cold dead hands (she recently backed down and began accepting plastic, applying a $15 minimum).