Their is some truly amazing success stories on Fiverr. This seller for example must be one of the most in-demand providers on the site:
https://www.fiverr.com/crorkservice
With over 500 orders in the queue at any one time, they must have a small army of workers performing these tasks.
The turnover of this Israeli company must be fucking huge. In recent weeks, they added an additional processing charge onto all orders that are paid for from Paypal etc.