Thanks IncoherentLight for explain my doubt and sorry if i offend you is not my intention.

Well, there's no risk of losing one's account outside of bad behavior resulting in permanent ban or suspension (and that takes some doing, from my perspective - the bottom of the roles page as a list of things that can lead to suspensions). The site has approximately a million users now, and though many of those accounts are inactive, those who aren't are mostly people who have moved on - they should be able to return and resume winning and giving away games if they decide to come back to the site.

Levels offer some advantages, with the main one being it allows you to enter giveaways that have a higher threshold. You'll hit level 4 soon, thanks to your giveaways, which you may notice opens up giveaways that won't have been visible by default. Levels can also be a requirement before you can enter some groups (groups have a smaller pool of participants - fewer giveaways, but far fewer people entering to win).

SG levels also have a minor social aspect to them, too, in that high levels show you made giveaways, which contribute to people enjoying the site, so people tend to appreciate that. Ratio's another aspect of this - having won much more than you've given back can be viewed in a negative light. However, like levels in Steam itself, how you conduct yourself carries more weight than how many games you've bought.

The Discussions section of the site is where much of that social activity goes on. Public giveaways like this one have a high number of entries, but things like puzzles or trains tend to have far fewer (since you have to find them in the discussion forum), improving your odds. Group giveaways have even better odds. In fact, more than once I've seen giveaways not meet the minimum 5 entries required for the giver to get credit on a group giveaway (this is to prevent someone from giving a game to their friend, and vice-versa, just to boost one another's level).

Speaking of groups, if you find you're not winning as much as you like in another six weeks, take a look at the Unlucky-7 group. It's not open immediately to new Steamgifters, but for people whose luck has netted them 7 gifts or less by then, it offers a way to improve your odds and keep people from getting too frustrated if they seem to be giving and entering but still not winning.

Feel free to message me if you've got any questions about the site, or in the Discussions area, you'll see some people with the (moderator) flair by their name who should be helpful in getting the hang of the site. Cheers!