There doesn’t seem to be an RSS button here at Freethought Blogs, but if you use Feedly or some other feed reader (Jema), you can subscribe to fierce roller at https://freethoughtblogs.com/fierceroller/?feed=rss2. I haven’t yet figured out how to subscribe by email, but if that’s your preference there is a slightly kludgy solution: you could convert the rss feed into emails using a service like feedmyinbox or rssfwd.