I find myself wondering the same thing every time this topic comes up; are Keurig REALLY that dominant? Shouldn't this be the end of them? If I can make an equally good product and put "accepts all pods" on it, wouldn't that sell like... well, a lot?
You are confusing two different kinds of "Early Access". The one you're thinking of is where people get to play early version of a game, often by paying (though not always).
The kind talked about here though is where reviewers get a copy of the finished game before it goes on sale. Think of it as the equivalent of having screenings of a movie for critics before it premieres.