To be curious...

As for your second question, visit https://www.steamgifts.com/stats. There is a fully automatic system telling you what you should be winning based on which giveaways you enter. It will tell you whether its luck or just you entering the wrong giveaways (see the 'Luck Per Month' graph).

Here are an example of a bundle you could buy with a certain ammount of keys of your choice ofc, but it's mainly the
"10 BUNDLES instead of 1 For ( 60 keys Games ) : $4.99" I wanted to point out for you.. But there are more sites to get multiple keys at! :)

Humble bundle, BundleStars and Indiegala. Generally HumbleBundle

Better not ask for free games, jotapdiez. That's against the rules. Please edit your comment. :(

(If some one wants to gift me one of the games that I tell before I will be very very happy!!!)

No begging here please!

Maybe try joining some Discussion Trains

They usually have 100-300 entries compared to the usual giveaways.
And if you want to win more mass key giveaways (Not sure if this is allowed) but check out http://www.free-steam-giveaways.com/ run by Marie. She gives away 70-90 keys daily and you can check her site for the invite only link.
https://gyazo.com/8104cbcb14ab91b9666565ebef122144 90 keys and 500 entries so around 1/6 chance of getting a key.

The usual 50 key giveaways have about 10 000 entries (0.5% chance)
I hope this helps and sorry if i accidentally broke some discussion rules.
I rarely browse steam gifts discussions :p

You can increase your odds by giving away games, you'll increase your level and you'll be able to enter more exclusive giveaways with less participants per game.

Currently, you are level 1, so you can enter giveaways which are restricted to level 1's, leaving aside the thousands of level 0 accounts.

And... You should erase the message above:

(If some one wants to gift me one of the games that I tell before I will be very very happy!!!)

It's against the rules to beg for games, you'll eventually get them, just be patient.

Thanks for the answers, now is more clear for me.

Sorry for "ask for free games", I deleted that part, was more a joke than other thing.

Don't forget that you also have the option to trade for games. This site has a fairly nice trading section in which you can work out all sorts of deals. (You need to be careful of scams. But a bit of care will take you a long way.)

With trading you don't have to wait to be lucky. Of course, in order to trade you have to have something to offer. What I often do is buy a bundle, keep what I really want to play, and trade the rest. It's kinda' like like winning. :)

you won something today, gratz.

last three lines started with ITH had me going for a minute lol.

Por poner un ejemplo, las keys del resident evil 2 revelations, se consiguen junto con otros 3 juegos por un solo dolar en humble bundle, lo que hace la gente es comprarse varios packs de estos (total 1 solo dolar, como vos decis son 15 pesos y ahora con 15 pesos no te compras ni medio chicle xD).