Also, the reason people have bought from Fiverr is the cheaper price. If you find someone who does SEO Audit (for example) for $20, the same service via a company agency will be $40-50 or more. And Fiverr customer has no reason to choose a more expensive offer once he/she got a cheaper price and is happy with the service (obviously when putting good review). Even if you found 500 potential leads for business the agency/company will not pay you because they have the chance to get clients most likely will be zero.