[NotGMan]

Who actually uses RSS compared to email? 1% of your customers?

[prmoustache]

Are these customers really interested in receiving mail or have they been subscribed through deceiving tactics by forgetting to uncheck a checkbox?

[sonar_un]

Seriously, almost no one uses RSS. Of course it's the best format for subscriptions, but the average person uses e-mail and understands e-mail.