When your application you worked so hard on to launch, doesn't gain the investor's money back, praise yourself because you can put it up for sale on eBay. So if you think twitter is great and you need to copy it, go ahead. Or you can buy a startup from ebay. Dukudu is up for sale. You can always sell it if nobody likes it.

The project is said to have cost its developers €25000. Despite a relatively low Alexa score, Dukudu ranks at a respectable 2,608 in Germany.()

I can only agree with Duncan from Techcrunch. The site is in german only. How do you expect to get a large clientele ?