>>724653115
vocaloid has always been a fan-driven thing, i'm sorry.
companies have never dictated who can and can't be paired with miku in songs, videos or art. all they do is license and release voicebanks. miku can and has been paired with anyone imaginable, teto included. concerts and games are a small part of the much bigger vocaloid fanbase.
take it from someone who actually likes rin. she was the reason i got into vocaloid.