The significance of a product is highlighted if it can bring utility to a large community of people over a long period of time. Social entrepreneurship involves recognizing and executing an opportunity to improve the livelihood of others.
At Elaine's request, George purchases a "big salad" for her from Monk's. When his girlfriend appears to take credit for this, George becomes obsessed over the issue. His altruism is not pure: George derives utility from the fact that the purchase is associated with his generosity.
George puts a dollar in the tip jar at the pizzeria, but the counterman's head was turned and he didn't see it. George laments that it cost him a dollar, but he got no credit for it. His altruism is not pure—he gets utility not from giving, but from getting credit for giving.