Hmm perhaps, but were google+ invites completely random? If so, then I probably am wrong and it truly was a technical field test with no marketing gimmicks.
Either way, having a closed invitation has genuinely made me more interested in the product.
Either way, having a closed invitation has genuinely made me more interested in the product.
What about non-Googlers? I feel like there would have to be some sort of algorithm that did it for you, what with how many people use Googles' services.