Anyone else having their billboards expire within a few hours? The 10k one used to last me for a month, but now it's all gone within less than a day. How come? Is it a glitch?

I strongly recommend submitting a ticket. I know there have been problems with ads of late, and not sure if they've been fixed. But things like double ads showing up in some places - wonder if that would "count" as two impressions?

I haven't submitted an ad in years, so personally, I don't have anything to add to your issue. I also haven't noticed anything in the bug forum about billboards.