Not sure if it’s just that popular or if there are any actual playtest. I signed up for about a month now, everything went well in terms of their “first” play test, had no issues with microphone as others described, but I’ve checked my email and nothing. I was told that based of my initial play test I would be on their list and be sent emails on other play tests and received notice of one, POSSIBLE, play test and asked to update my preferences, after which I received no notice on whether I was selected, or not, and have not received anything else from them. Sign up if you feel like it, but don’t expect to be flooded with play test like the images on here show you will mostly see a message that says “We’ll let you know by email as soon as we have a playtest for you.”