Falling right into the "must label everything" trap. I got into a conversation about "professional cosplayers", and could it really be thought of as "play" if you were being paid. We finally decided that what made it "play" vs "pro" was if you picked out the costume. If someone else picks out your costume, you're an actor; if you picked it out yourself (even if you only purchased it yourself) then it could be considered "playing".
Which bring me to another point. We sure do like to label things, and then let other people know if we don't agree on the way they label something versus the way we label something. We should probably stop worrying about it so much.