The only sensible way to use Fiverr as a professional VO artist is to create a clear differential between a basic stripped down, single take, no revision service for low paid Fiverr gigs, and the industry standard service we provide for clients we work with normally, which include same day delivery, multiple alt takes, free revisions, etc.
The key is to create a real difference between the services, and be open with buyers that they are getting an economy service for a low price. I record low pay Fiverr gigs at the end of my normal sessions, charge for quicker delivery and every other extra, and if buyer wants a revision they have to pay for another order.
Also, if you’re frustrated waiting for Fiverr to set up Pro VO gigs, it’s perfectly possible to set up your own Pro VIP gig for whatever you want to charge. Then the buyers have the option of upgrading if they want to.