I think I expressed the fact that I find it awkward that people I've either had a contract with...or certainly that people wouldn't buy a product more than 18 months ago. I think 18 months might have been useful in other contexts, but here, I think, what you're trying to distinguish between is e-mails that you don't want to receive and e-mails that you do want to receive.
I think 18 months is an arbitrary cut-off. I can have a relationship that's well over 18 months, and I want—