^ Czech performers participated for 3 years straight, they had the MOST famous Czech performers in the NF, they were represented by people who use to hold #1 place in the charts for weeks.
They had quite big promotional campaign and actually I don't think that their ratings were really low
When they changed the Head of the broadcaster in 2009 the attitude changed. Go figure.
They send the MOST popular Czech performers with quite sucky performances @ ESC. The new bosses didn't want to invest money and be busy with preparing ESC entries.
I don't think that this attitude would change in the near future.