Airports don't pay for advertising, airlines do.
Easyjet are always advertising on Welsh media. They have a base in Bristol, as do Ryanair, South Wales is a catchment are for Bristol. Logic?
Fact is, we're in the summer season. Economy is still crap, airlines are still tightening up. NOTHING is going to change in the near future. So why keep complaining?
Everyone has just got to ride it out and wait and see what does happen next year, or the year after.
The airport is still open. The strong routes are still being operated and people still have their jobs.