OTOH I've never had issues with the texts (unless Twitter was down, obviously), while I've had plenty of emails show up late...
I think the answer is to have two notification threads - one for all posts, ands one for only when Twitter is down.
<ducks and runs >
And then one more for "hot" deals when Twitter is down and another for "hot" deals when Twitter is up.
Then we'll divide hot deals into only hot deals for cameras, only hot deals for airfare, only free stuff, only credit card stuff, only...