Dota: Valve recabando info para enviar betas masivas?

So my friend (who got into the beta before invites were sent out) has been emailing the dev team about getting hold of invites for myself and some other friends. He got a single invite, and wasn't allocated any more to gift to people. When he asked for 2 additional invites, this is what he got:

"Wouldn't of thought so Lee. You got yours through the random invites we send everyday. It's a kind of RNG thing based on how many games you own on steam and how many hours total you played."

(UPDATE 1

Another section of this log is as follows:

[3:06]Lee - well one of my mates told us about some lass who got some keys but the only game she played was the sims.

[3:06]Greg - Yeah it works like that sometimes. The Beta wave invites are made up of a mixture of skill based players and completely new gamers, we initally want the Beta to be tested by people with experience but with the server increase. We want anyone who would be willing to give it a go and give us some feedback.

(UPDATE 2

After talking to my friend, he has confirmed the person in these logs work on the artwork side of things, specifically the headers for the dota2 website. Not exactly who I thought he was to start with, but he also added the following:

[Missed message][3:15]Greg Like I said before try e-mailing the Dev team like every other week, keep the e-mails short they are read more than you think.