Fiverr has so many issues with their service providers that I don't see them staying in business. Several of my projects have been incomplete, tried to strong arm for more money before completion or simply have not replied to the business. There is a sense of laziness and an attitude of "you should pay me, but that doesn't mean I should do your work."
The support behind Fiverr is no better. I have had missing refunds, support that refuses to acknowledge that my work was not provided and inability to back up the buyer. It's a bad ethic to have, especially considering that it's the buyers that are allowing their company to exist and most of the time, we are contacting them because of unsatisfactory work.
There are a lot of sites that offer the same services with much better support and actual work ethic that has to be matched.