The letter then goes on to point out the differences between illegal and unliscenced:
"Laws come from Congress. Licenses come from businesses. Grooveshark is completely legal because we comply with the laws passed by Congress, but we are not licensed by every label (yet)," the company said.
Grooveshark operates within the boundaries of the Digital Millenium Copyright Act of 1998 which, according to them, "encourages technology companies to innovate in hopes that they will eventually solve some of the problems that are plaguing content producers today."
Google likely pulled Grooveshark over worries it may upset the labels as the company attempts to create its own cloud-based music program.