What is your opinion on free stuff when gaming

This thread is both question and discussion

Nowadays there are applications that gives out freebies for your mmorpg, or mobile games which are pretty convenient for gamers on a really low budget. One of these apps are like Exp Game that will give its users promo codes for certain games like, Conquer Age, I love pasta, demong Hunter, or Angel stone.

The good thing about these kinds of apps is that it supports your gaming lifestyle as it helps you in receiving experience, items, even cash. If you don't know what I'm talking about, simply view it based on experience. check it out on google playstore under EXP Game

The question is, would you use these kinds of applications, or rewards, and if you are using something right now, what are you using?

Nope. I am not looking for any application really, yet. But instead, asking what your opinion is on gift giving applications such as EXP Game, if you use any and if you use any, or these kind of stuff, why do you use them, or if not, why don't you use them?