I must say, Danny Sullivan was quick to respond on my one critical post on the SES conference.
To be fair, I have quoted his response below:
Yes, suffice to say, we don't want you overwhelmed with notices. For any show, we might typically send out two or three emails. Usually, it something like the show is coming, then the agenda is up, then hey, the deadline for a discount is approaching. The content should be slightly different, and always with a reason to keep in touch with you.
We honestly get few complaints about this. Seriously, I could count them on my fingers, that few. And of those few, it's usually, "why did I get so many in one day." That happens because despite deduping attempts, occasionally people are indeed on more than one list and not spotted.
For example, I'm on several different Jupiter lists, ClickZ, ClickZ Stats, SEReport, SEUpdate and SearchDay to name the ones I can remember. I got one email sent to me today as part of being one of those lists. The deduping seemed to have worked.
I'm also on a separate list just for people who expressly want to get notified about SES shows. That caused me to get a second email. It would be nice if that was also deduped, but at least I understood it more.
If any of your readers feel like they are getting too many emails, or have gotten duplicates on the same day, feel free to have them get in touch via our feedback page and I'll forward the information so the SES staff can look into the problem.