Why so many DotA 2 give aways?

A new wave of invites from Valve.

why so many "why so many" threads?

Valve doesn't give invites to offer why ?

I think the people who receive the invitation to get two more and those who already had for the give away to friends, I think it is almost to come out to the general public

and there was a facebook thingy, when u "liked" the MEEX Games u got a free key. I got my dota 2 from there, sadly they run out of keys. And its a retail version. I heard that u can get your own dota 2 for answereing to a survey (http://www.dota2.com/survey/experience/) and waiting for a few days too... its a joke that it worths 10 $ here ...

Anyone wants my copy? Contributor value has given me mental complexes to not gift free stuff.. don't care what you do with it.

//edit Has been given