I was able to mine and now the option disappeared. Did you disabled it for a moment? Its amazing and I really like this. Very excited about mining links. Also, I can not mine on phone with windows 10 mobile.
Ok, this is a dickish move on my end, but hey I'm an asshole!
Whoever is not enrolled yet into the freebitco.in mining can probably get a taste of it on this URL - omitted -
You can get your YOUR_FREEBITCO.IN_USERID from the profile tab. Earnings won't update as you don't have an auth key, click mine and check if the balance updates on your freebitco.in account, no promises though but it should work in theory.
please delete this.
thanks.