BT Broadband customers get BT Sport free so if you've got Sky then you can view MotoGP free.
1gb is about an hour in standard definition of tv viewing based on downloading from iplayer.
10GB a month? That's not much really. Virgin slow down my connection for the rest of the day if I go over 5GB in a day but they only slow it down from 60Mb to 10Mb so I tend not to notice when it happens And yes, it is easy to hit 5GB in a day of you download a software DVD or two from Microshaft.