Probably Chavez forced their hand, like in Bolivia
Still a leftover from Lucio Garcia's administration, likely. They impeached him for trying to be Chavez, but there are likely still remnants around.
Anyhow, Ecuador is still more pro-U.S.A. than most of South America.
Don't take this for too much of a big deal, yet. Ecuador is booming with American businesses these days. Guayaquil just build a whole new downtown complete with IMAX theatre and everything.
It's a far cry from Hugo Chavez's Venezuela.