I did forget about one advantage to letting them roam: inbound links. Every inbound link increases our importance to Google. But yesterday
this lowbrow site linked to an iotd blog view, and it really hit the bandwidth hard. Over 7000 views of that page alone.
I should investigate putting some sort of advertising on the blog view to try to recover for the loss of bandwidth for something that won't do us any good any other way. Otherwise, if this keeps up, I may have to shut the blog view down.