To me the Sauber team is a little perplexing.

Prior to the BMW takeover, they were a well sponsored private team. However, now they have very boring paint scheme with no visible sponsors except for a C1 logo on the engine cover. Btw, does anyone know what that logo represents?
When BMW bought the team from Sauber, they went gung ho sinking excessive amounts of ca$h to build it up c/w sponsors. At that time I thought it was strange that they kept the Sauber name in their team name. When they sold it back to Sauber late in 2009, it was again strange that this time they left BMW in their team name.
Like Brawn last year, I can't quite understand why they would not have secured some short term sponsors by mid season & show some progress. It's better than running a bland, non sponsored car.

Are they teams demanding too much $$$ from potential clients?