It's not a pointless survey. LCY does this a lot. As you can see it gets picked up by other organisations and published. Its a cheap way to get in the paper and magazines.
SEN get to mention that they fly to Zadar and it doesn't have the Euro which will drive people to look at it and check flights etc.
I noticed that there are also billboard ads for SEN and their routes along the A13 especially around east London.