If you've downloaded any kind of free-to-play game in the last few years, you have no doubt been tempted to pull your credit card out and snatch up some in-game loot. As it turns out, this isn't just a fun game mechanic; this is a heavily researched and analytical tactic employed by game companies to suck you dry. A recent video highlights this, but at the end of the day, are we really the biggest problem? Here are five reasons why gamers may be their own worst enemy.