If you think a summary feed will boost site traffic I’d suggest you think again. The real thing most bloggers want is connections. The easier you make it for people to engage with your thoughts the more likely you are to get connected. A summary feed doesn’t do that as well as a full feed.
What about folks who only want a summary? My experience is there aren’t many of them. But for the minority who prefer to read summaries, you could always provide a summary as an option.
Will a full feed suck up bandwidth? I doubt it, but I’d be interested to hear the experience of others. From my stats, I reckon that my full feeds account for only one-third of my bandwidth use this month. I don’t know what deal you’re on, I’m running way below the 5MB ICDSoft give me. So I could stand a heck of a lot more visitors before worrying about it.
[UPDATE]Mark at CSR China says he likes this blog even though I’m “another that can post endlessly on RSS feeds and excerpts and stuff”. Ok, Mark, point taken. I won’t turn this into an obsession.