No offense, but saying no to free weekends because it brings in some not-so-skilled player is pretty retarded in itself. You have to look at the big picture and choose what is good for the game, not what's good for yourself in the short term.
Beside, most of the very bad players will likely not be buying the game anyway.
people like that ruin games. if you want your kf to be filled with griefers, spammers, trolls and just down right retards all for the sake of giving twi more money, go ahead.