thats odd, when I google it I get:
Definition of: e-blast. e-blast. (E-mail-BLAST) An e-mail message that is sent out to many recipients. If the volume is huge, and the recipients are random rather than targeted, an e-blast is no different than spam.
When you get an email from Gamestop, BestBuy, Apple - whomever, you subscribed to the email list, it's an eblast. yes, I'll have to find a different option. In my defense, if you visit the home page of Hype, you'll find this:
Nothing says “I Love You” like an animated valentine's day card! Or send clients animated season's greetings.
I assumed if it could do ecards, delivered via email, then an eblast (email ad) is not a far jump.