If, like me, you've any unused Boost SIM from this deal, you should check whether they are still valid. You can do so by going to the activation page, put in the SIM number and click "check number".
I have two left.
Tried to activate one yesterday and the system said the SIM is invalid and couldn't be activated. Complained to Boost (got given a big runaround between many of their teams) and was told they'd get back to me (which of course does not happen).
Tried the remaining one today and the webpage also showed that it's invalid. Called Boost again to add that to the original complaint and was told that they have decided that they would not provide me with any replacement starter kit because it's over 30 days since purchase (despite the fact that I should have 18 months to activate the kits).
Just contacted Groupon and was told they'd escalate/investigate.
Dammit! "The SIM is not available for activation. Please enter a different SIM serial number." The one I used last month worked fine.
Was going to use this one next month too…