Cheap editions

Why are sometimes games re-released in some special editions, and why those special editions cost much less than previous? It may sound strange, but games dont cost still same price. For example for poor countries, they are released in editions that cost 1/4 of US or UK price. its because, that main investition made to game is developing of it, to make cds and boxes for them is very cheap. (i tihnk, it cost about 1 Euro to make cd, pack it into printed box, and send to shop) So target is to sell game there with less (but still good) profit. And similar situation is with those special editions. They are being released some time after those "normal" and are for poor players, who dont have money for normal original. They probably downloaded game in moment it was released, but now when they can buy it legally for reasonable price, there is good chance they will do it.