About Twitter hashtags and giveaways...?

[Andre]

OK, I have a couple things I'm wondering about on Twitter. I joined mainly because there are code giveaways for video games (gold weapons for Gears of War), and it is only required to hash certain text to enter in these giveaways. Does that mean I just put # in front of something (i.e. #gearsofwar) and they automatically see it or is there something else to it? They've been doing these giveaways for a while and I've never been mentioned.

Also, I created about 20 accounts to enter each with their own e-mail addresses. By some chance, could they realize this and have discounted me? I'm curious because some people won multiple times with apparently one account and I haven't won once with 20. Am I just that unlucky or doing something wrong?
Hahaha, I just looked up Newt G. I didn't create 1.3 million accounts but I might if I have the time.