Yes, I get several daily in many of my accounts. It is a shame since there are so many people who enjoy getting/sending e-cards from reputable businesses.

You are probably getting the ones in your business account through someone else's machine (a client's) that is being filtered through by the spammers without the person's knowledge; that's where most spam comes from and why it can't be caught. I have one account I think has been compromised in that way (and once they have the address, not anything one can do about it) so I turn off my machine when I'm not using it. Not good to leave on your machine 24/7 as stuff happens when you're not there that there's no trace for.