Well, it's not the only difference; it's one reason there needs to be some action here. But there are other areas too, and in some ways they are related to cost. Think again about the success rates that are needed. Almost any legitimate business, if we're going to talk about businesses, is going to need some kind of reasonable return rate in order to enter into the venture. If no one ever comes into my store, the store is going to go bankrupt. If no one ever responds to my physical marketing, or if I get a very low return rate, I'm going to stop that marketing.
That's not what happens here. Here, you can send and send and send. You just need to grab that one person, that gullible senior citizen who gets this message and is told that someone desperately needs help and there's a pot of gold at the end of the rainbow, and suddenly the life savings are gone. We laugh, because we wonder who is ever going to be silly enough to fall for this, but people do. We haven't had the legislation in place to deal with these kinds of scams, much less the unwanted marketing, now going on for years.