Civilization 5 is only one of many ways the NASDAQ listed company Take-Two Interactive Software makes money. Increased profit is more likely to go to increased bonuses and dividend payments, and as extra capital to acquire new companies. You don't make your money by making games "better". The market for 100+ hour strategy fests is tiny compared with the market of short attention-spanned impulse-purchasers who won't play more than 20 hours. You make stupid but superficially clever games with fancy graphics, and advertise them well.
They may use your money to buy the names of other actual good games, in order to debase those games to make even more money. If they spend any more money on this game, it will undoutedly be mostly on graphics and advertising.
So no ... you're more likely to get a better game by not giving them money, making sure the money-men ruining the title don't get their arguments proven and bonuses paid, incentivizing the developers to retarget its original market.