I think OED should add the word "Unlimited*" to the dictionary as a word in its own right, meaning "limited in some way".
It looks like it is even being treated as a word by some. See this where it has the phrase Unlimited****, yes that is four stars.
However, the page only has foot notes *, **, and ***.
The only possible explanation is that they use the new word "unlimited*" followed by *** which is Subject to Fair usage policy. Either that or they really mean "unlimited", but what this chances of that!
P.S. The 20GB limit has ***, i.e. Subject to Fair usage policy which is a tad odd - is it 20GB or fair usage policy limited I wonder.
P.P.S. "Upstream speeds, at up to 10Mb/s, will be the fastest in the UK" is not entirely true as we do fibre links at up to 10Gb/s if you want.
P.P.P.S. The name is silly, I can't help thinking Stargate Universe.