The one I've tried is IFTTT (I get email notifications from them but it's the same technology) the problem is that it only checks the rss feed every 15 minutes and often that's too late for some deals 
I don't know if that's an issue with rss in general or if it's an ifttt thing, though.
Email is not an option! We need texting to work!
And I feel bad for Dan, all those subscribers who want to follow will need to re subscribe to his Deals!
I'm sure the MS will not be receiving the same traffic as it did now that SMS is down!
Or maybe even more traffic being that SMS is down and people don't want to miss a deal! Lol