Not sure how this will go down but if it helps even one or two people thats all that matters.
I believe this deal is for existing EE data SIM holders, as I just received a txt from EE which reads:
Hi [Name], as you're enjoying your 4GEE Data SIM, why not crank up your data allowance by moving to a 12-month plan. Get 64GB data for £16.10 a month. Call to discuss: 08009563104
I took out the rolling 30 day data SIM contract that appeared on HUKD of 32gb of data for £14.50 which became pretty hot.
For an extra £1.60 to get double the allowance albeit at the drawback of locking in for 12 months seems fairly reasonable....