Please remove the ads from the welcome screen.
There should be a small "X" in the upper right corner of the promotion box. Click it and it'll go away (and will stay gone on subsequent visits).
There wasn't an 'X', and it shouldn't have been there in the first place.
The advertising should not have been there in the first place. Sorry for the ambiguity.
I've been around since May and I haven't ever seen any advertising on this site.
It is in the "Welcome Screen" of your control panel.