Never... But I got more than 3 earthworms in all my games together
90% of the people vote NOT for the best song, but for the country they have the best relations with. I know, this is also what all Germans said in the last years. But I think you exaggerate a lot. True, some results were a bit "surprising", but if it was as you say, Germany would either have lost again this year or got better positions in the last years. Same with all other countries that have won exactly one contest. I guess about 30-40% vote for a certain country, but then there are still ~60% left who vote for the song they like best. If it was like you say, you should be able to find a pattern in the list of the winners...
Anyway

Actually, I watched it for the first time and it was fun for me. Nothing more to say^^ This has been too much text already.
The next poster has stopped playing KadoKado.