Lots of people will create a single address for each company that wants one, so that if it gets compromised it can be shut off without affecting any other incoming emails. And identify the offending firm. I have created an email account for a store that wanted an address while I was out in their parking lot (the ones that had plausible future value to me).

So far, none have been sold to marketing lists. Which says either that I'm a pretty good judge of firms, or that no one is interested in me. ;)