I received this offer earlier (see image attached.) and called today. I am upgraded to Blast for two years lock-in price of performance (44.99) from now with 2 years agreement ( It has early termination fee if service is discontinued after 30 days remorse period and within 24 months. - $240 max which reduces by $12 every month of service during 24 months of agreement period.)
I was anyway out of my performance promotional period and need to hunt for better price tier. Good one for those who have no other overall better option than Comcast (just) Internet.
You need to call 1-855-339-3149
Update: It took 30 hrs to get my account updated. I power cycled the modem and see image below....loving it.
Adding here as well (added to wiki too)
DOCSIS 3.0 Modem Required to realize the speed offered. With older modems (non-DOCSIS 3.0, downstream will constraint to 30 Mb/s or less]
Some Comcast approved DOCSIS 3.0 Modems:
(SB6121; Buy Walmart warranty for $4 for 2 years)
(SB 6141, Buy Walmart warranty for $3 for 2 years)