Friar,
That's a shame to hear, since we've all enjoyed your hosting. Until last night, when you attempted to shoot me down, towards the end of a co-op when you were my wingman!?! But as you say, the host makes the rules.
But I agree with Gec, hosting these games only sends small packets of data. It's not like streaming video, which will suck up your 10GB monthly limit in no time. So I can't see how your hosting has used up your monthly limit. As most limits are for downloads, not uploads.
Cheers anyway,
GK