Here is what happens when you make a post with around 2MB of images in it…
That was a spike from my usual 100MB bandwidth use a day to over 2GB! I usually only use about 2 or 3GB for the whole month, so that was a bit of a surprise. Also, I only pay for 25GB a month so if it sustained at over 800MB a day I was going to be in trouble… (well, it would only be $2 more for an additional 50GB, so not too much trouble!)
So where did all that bandwidth go? Looking at my blog access stats, only about 20% of it is from people actually visiting my site. So the rest seems to come from people looking at my RSS feed, either directly or through sites like Planet Arch Linux that syndicate the feed.
That means I could drastically reduce my bandwidth usage by posting only a summary to my feed. But given I really dislike seeing only article summaries in my feed reader, it is not something I would really want to do. It is not as if my site has any advertising, so there is little point driving people here. Also, I would probably need to spend a few hours getting WordPress to actually provide summaries in the feeds the way I would like them (because WordPress never does anything quite “right”…).