I own a domain, adrr.com. I've had it a long time, my e-mail used to route through it. Sigh. Not any more.
Because it is a four letter domain, it is on the list to get spam -- lots of spam, tens of thousands of spam a day -- all of it sent to e-mail addresses that don't exist, but might. Enough that my hosting service had to shut down my e-mail server and briefly had the domain itself shut down.
Many four letter domains are worth a lot, a couple hundred thousand dollars or more. Mine isn't (not to mention, if it were, I'd probably sell it and move everything to srmarsh.com where I keep my slow moving negotiation blog -- having a four letter domain isn't that important to me). Many generate a lot of revenue. Mine doesn't, http://adrr.com/living/, for example, just doesn't have much commercial cachet.
As a result, the "solutions" that cost "only" fifty or a hundred dollars a month just were not reasonable.
But if you've wondered where I've been, I've been "snowed" under, so-to-speak, by spam.
If I could reach back and actually touch them, I'd arbitrate and then collect under the terms of service. Anyway, that is where I have been.