Great ! Thank you for sharing this information
Why did I learned about it only today ?!
I tried to add simultaneously these 2 arguments in the launcher shortcut properties "...\The Lord of the Rings Online\LotroLauncher.exe" -nosplash -skiprawdownload
It do not downloads anymore the advertisements in French + English + German each time I run the launcher, however I still have the splash screen (and have to press escape).
Am I doing something wrong ?