That is 100% against the TOS (unfortunately). Doing something like that gets you banned or suspended. Just be careful, stick to the TOS, and keep selling!
@josephshipley: You’re right on the ball with keeping contact info. I’m sure that’s why they prohibit it. Fiverr’s problem is not their fee, but their restriction of info. Other nameless platforms encourage outside communication, but offer their chat services as a way to record and protect yourself. These other services keep their sellers to keep selling by making sure that the seller is protected, via escrow and moderation services. When I know I’ll get paid, I’ll gladly cough up the percentage as “insurance”