Re: subway in pakistan
Arguably the best thing about Subway is their Tuna sandwich here. A lot of people (read, desis/muslims) eat it because it is better than your run-of-the-mill fish fillet offered by McD or Burger King and is healthier. The rest of the stuff is non-zabeeha.
In Pakistan, there is no such compulsion for people to eat Subway, as everything is zabeeha, plus they usually serve cold sandwiches, which very few people like.
So there you go! Free re-fills is probably the best reason left to go.