A question about Rev.com

I was going to sign up for Rev, but I'm interested in both transcription and captioning for them. Is there a way I can apply for (and be considered for, I should say) both? Or do I just have to pick one? I'm thinking I might just have to choose one, but also thinking maybe I can do both like some other transcription sites allow you (I think) to do both transcribing and editing.

Thanks!