The problem seems to be with the phrase "if you like online shooters, you might like Mobile Forces," which could be compared to the phrase "if you like dairy food, here is a brick of cheese." You MIGHT enjoy it, but with hundreds and hundreds of options for other, better, often cheaper online shooters, the question is why you'd want to.
As a free downloadable mod; a compliment to another, better game, Mobile Forces would be welcome. It's an online shooter where you shoot things with guns what shoot stuff, and will give you a couple of hours of fun. But it's not worth paying money for, especially when you consider how many other, better games $6 can buy here.