Just to clarify, I didn't suggest that renderosity sold its mailing list to 3rd parties.

I suggested you may have received payment to facilitate a 3rd party advertisement using the Renderosity mailing list and marketing channels. There is a clear difference. As it's clear this email was generated from Renderosity Business Newsletter newsletter@postoffice2.renderosity.com

If you did intend to pursue an option of actual relevance for your 3rd party marketing er.. announcements, you could easily use the Portfolio Software & interests selections as the filter. Of course the very implementation would lower the circulation and may lessen the appeal to 3rd party marketers, but it would be putting the community first.

Personally the big worry with this type of trend is that if Renderosity is receiving any kind of compense for the emails. 1 email of this type quarterly, may in time become 1 monthly, eventually 1 weekly, 1 Daily.