I was using this service back when many people were using RSS and Twitter was somewhat of a sane platform for interaction and information. It isn't as much as the lack of RSS use (I still use RSS) but more so of the lack of use of Twitter itself, which made me abandon this service. Twitter eventually became somewhat reasonable to follow via Lists. They don't want you to use RSS anyways, so ... we move on. Twitterfeed was a good and reasonable service.