What if I work for an agency but I don't do any freelancing on the side?
That's totally fine - you can have a profile up linked to your agency account. For the rate, just put the rate that your agency would charge.
The nice thing about this is that if someone finds your profile and is interested in your skill set, they can hire your agency. Now you're helping to drive business to your agency and you will even get a little cut of the referral fee that we charge.
If you're concerned about your agency being able to guarantee that you personally will be working on the project vs. other team members at the agency, you can just make sure that you are able to consult on the project a little bit at a minimum, if not being more involved.