the drastic measures that I have taken during the weekend are having effect and the traffic has been reduced. Yesterday the traffic was down to a more reasonable 57+ mb, instead of the usual 200+ that was the typical bandwidth use in February.
Nevertheless, I have only slightly more than 1gb of bandwidth left for the month. And 11 days to go, and other domain hosted on the server. Which means that I have decreased even more the speed for phpGrabComics.
Sorry about that. I may reconsider these issues in March - from now to March I might have to decrease the limits again.