Rough number of beta testers?

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I am curious how many active riders are there currently in the beta?

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“It is currently in beta testing with 500 users but has a waiting list of 15,000 people ready to sign up on launch and pay the $10 monthly fee.”

source:
http://www.telegraph.co.uk/technology/news/11245527/The-cycling-computer-game-spotting-future-sporting-stars.html

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My guess is that something around 1200 now.
I have seen wave 12 and 100 beta users per wave.