Timothy Schmit may not be a full partner now, but he may have been, or close to it, when he first joined in the late 1970's. Poco was a well-known national touring band, and being in Poco was a good gig. The story I always heard was that the Eagles made him an offer he couldn't refuse to jump ship. I have always assumed that meant a full partnership, although I don't have enough knowledge to know this for certain. Perhaps someone else has more info. It is also my understanding that the Eagles partnership structure has changed, so he is less of a partner now. But I have a sense that his legal standing was enough so that he was still the bass player when they reformed for Hell Freezes Over.