The events we advertise for, on the viewer Message of the Day are:
The idea behind what we agree to advertise for and what we don't are simple. If it's going to benefit you financially either directly or indirectly (publicity stunt), we are not going to advertise it. However if it's purely for residents, hosted by residents with no profits or financial benefits either directly or indirectly to you or those involved, we will consider it. We have always been, and will always be, about the community.
We cannot however advertise religious events or anything that may offend or exclude other races, creeds, cultures or persons. For example, we were asked to promote Memorial Day, and while we support troops all around the world 100%, it is an American event which other countries do not participate in. That makes it exclusionary and not something that qualifies for us to promote.
If you have a community event that you would like promoted on our MOTD you can send a request to email@example.com for consideration. We do not charge for advertising nor will we accept any benefits, financial or otherwise. Though you can expect we may attend your event ;). Please provide your in-world name and details to the event. All events we advertise for are required to have a website we can link to.
Note: we do not promote anything on the login page itself. Just the Message of the day.
(Extracted from this blog post.)