The filming of the videos is probably the biggest giveaway that this is a free site, as there is no pristine studio, crystal clear audio, or simultaneous multiple camera angles – just Justin sitting wherever he is that day, playing his guitar, and showing you what to do. It’s certainly not bad, but obviously lacks the polish of the paid-for tutorial sites.
You’ll also notice that each button requires a different amount of pressure in order for the chord to play properly. The further away the buttons are from the guitar’s nut, the less pressure is required. Vice-versa, the closer you get to the nut, the more pressure is required (i.e. blue button requires the least amount of pressure while the yellow button requires the most).
PS If you’ve read this far, then you probably are at least thinking about taking the next step. Stop thinking about it and doubting in yourself, you want this, so take the action necessary to achieve your goals and continue towards becoming an amazing rock guitar player right now! You won’t regret at least giving it a try, but you probably will regret it if you don’t.