Having your name out there shouldn't be a prerequisite for doing worship at your church. That is incredibly ridiculous.
I should say that it's not entirely surprising to me. The Minneapolis area has a very clicky music scene, particularly in Christian music. Everyone knows everyone, helps out on their recordings, plays with them every now and then, etc. So if you're not a member of that group (yet), then you're not looked at. I work in finance, and trying to get on the worship team is like trying to get a job at an investment bank. It's all about who you know (and Jesus doesn't count)...