What use is 1gb when most services use just 50mbps?
Hardly matters, when all that's up for grabs is £67m. Given the challenges of UK communications, that's not going to go very far at all. And normally with the crappy, complicated voucher schemes, a proportion will never get presented and paid, so government are probably expecting to pony up about £55m.
Given the billions government wastes on crap nobody asked for like HS2, or the bloated and ineffectual foreign aid programme,even £67m is nothing. In terms of blundering MoD mis-procurement, its still next to nothing (5% of a failed Watchkeeper programme, for example).